{"id":18641,"date":"2026-06-19T15:12:12","date_gmt":"2026-06-19T08:12:12","guid":{"rendered":"https:\/\/www.vietstock.org\/?p=18641"},"modified":"2026-06-19T11:10:33","modified_gmt":"2026-06-19T04:10:33","slug":"chicken-vaccination-schedule-2026","status":"publish","type":"post","link":"https:\/\/www.vietstock.org\/en\/industry-news\/chicken-vaccination-schedule-2026\/","title":{"rendered":"Chicken Vaccination Schedule 2026: Reference Vaccination Milestones From Chicks to Market Age and Pre-Lay"},"content":{"rendered":"
\"A
Vaccinating chickens at the right time and using the correct technique helps protect the flock against major infectious diseases.<\/figcaption><\/figure>\n

A chicken vaccination schedule is an important part of flock health management, especially for diseases that may cause major losses such as Newcastle disease, Gumboro disease, infectious bronchitis, and avian influenza.<\/span><\/p>\n

However, there is no single vaccination schedule that fits every flock. Vaccination effectiveness depends on chick source, maternal antibodies, local epidemiological conditions, vaccine type, storage conditions, route of administration, and flock health at the time of vaccination.<\/span><\/p>\n

As poultry diseases such as Newcastle disease, Gumboro disease, avian influenza, and infectious bronchitis remain important risks in many poultry production areas, building an appropriate vaccination schedule for each stage of flock development is an important management step. It helps reduce disease risks and maintain farm stability.<\/span><\/p>\n

This article provides a reference vaccination schedule for different chicken groups, key principles to consider before vaccination, and safety points that farmers should discuss further with a veterinarian or technical specialist before applying them on the farm.<\/span><\/p>\n

Quick Summary<\/b><\/h2>\n
    \n
  • Chicken vaccination schedules should be clearly differentiated by production purpose: broilers, layers, and pullets. Each group has different disease prevention priorities and vaccination timing. The schedules in this article are commonly used examples, not a national standard vaccination program. Specific timing should be adjusted according to veterinary advice and local vaccination regulations.<\/span><\/li>\n
  • The 0\u20134 week chick stage is the most important period, requiring early prevention against Newcastle disease, Gumboro disease, and infectious bronchitis.<\/span><\/li>\n
  • Vaccine administration routes such as drinking water, eye\/nose drops, spray, and injection directly affect immune effectiveness and must be selected correctly according to vaccine type and age stage.<\/span><\/li>\n
  • Common vaccination mistakes include using unsuitable water, failing to control water intake when administering vaccines through drinking water, and skipping booster doses when the vaccination program requires them.<\/span><\/li>\n
  • The vaccination schedules in this article are for reference only. Farmers should adjust them based on veterinary advice and epidemiological alerts from local animal health authorities.<\/span><\/li>\n<\/ul>\n

    Why Should Chicken Vaccination Schedules Be Adapted to Vietnam\u2019s Epidemiological Context in 2026?<\/b><\/h2>\n

    Poultry Disease Situation in Vietnam in Recent Years and Trends for 2026<\/b><\/h3>\n

    In recent years, poultry diseases in Vietnam have continued to occur in many localities, with uneven levels of risk by region and season. Diseases such as Newcastle disease, avian influenza, Gumboro disease, and infectious bronchitis remain important disease groups to monitor in poultry farming, depending on the epidemiological area and farm conditions.<\/span><\/p>\n

    Some global reports and studies show that Newcastle disease virus, infectious bronchitis virus, and avian influenza virus may undergo antigenic changes over time. Therefore, farmers should regularly review the latest recommendations on vaccine selection from animal health authorities and manufacturers, instead of simply copying the schedule from the previous year.<\/span><\/p>\n

    Provincial animal health authorities, such as the provincial Sub-Department of Animal Health and Production or the unit assigned by the provincial People\u2019s Committee to oversee veterinary work, also regularly update recommendations on priority diseases for prevention based on specific local epidemiological conditions. Consulting these authorities before building a vaccination schedule for each production cycle is a good practice that should be maintained regularly.<\/span><\/p>\n

    Consequences of Not Having a Vaccination Schedule or Vaccinating Randomly Without a System<\/b><\/h3>\n

    Vaccinating based on guesswork or thinking \u201cthe flock looks fine, so vaccination is not needed yet\u201d is a habit that can cause serious losses when an outbreak occurs. Once disease has already occurred, vaccination no longer provides preventive protection for a flock that is already incubating disease, because active immunity needs time to develop. This is a point that many small-scale farmers often misunderstand.<\/span><\/p>\n

    Common consequences of not having a structured vaccination schedule include:<\/span><\/p>\n

      \n
    • Chicks may face high mortality in the first weeks if they are not managed well and are not protected in time against diseases such as Newcastle disease and Marek\u2019s disease, along with other factors such as brooding conditions and early bacterial infections.<\/span><\/li>\n
    • Stunting and slow growth rates may increase when Gumboro disease is not controlled, as it damages the immune system.<\/span><\/li>\n
    • When disease enters the farm, response and restocking costs are often much higher than the total vaccination cost for the whole production cycle.<\/span><\/li>\n
    • Farm reputation may be affected if marketed chickens do not meet food safety standards.<\/span><\/li>\n<\/ul>\n

      Economic Benefits of a Structured Vaccination Schedule for Each Production Model<\/b><\/h3>\n

      In many farming models, vaccine costs account for only a small part of total production costs, while disease-related losses may far exceed prevention costs. The specific level depends on each farm\u2019s scale and conditions.<\/span><\/p>\n

      A structured vaccination schedule may help:<\/span><\/p>\n

        \n
      • Reduce flock losses throughout the production cycle.<\/span><\/li>\n
      • Reduce the need for antibiotic treatment, thereby lowering medicine costs.<\/span><\/li>\n
      • Improve stability in the marketing or slaughter schedule, especially when farms have contracts with buyers.<\/span><\/li>\n
      • Meet traceability and biosecurity requirements from buyers and quarantine authorities.<\/span><\/li>\n<\/ul>\n

        Principles for Building a Chicken Vaccination Schedule<\/b><\/h2>\n
        \"A
        A chicken vaccination schedule should be based on bird age, production purpose, local disease risks, and actual farm conditions.<\/figcaption><\/figure>\n

        Disease Groups Commonly Recommended for Broad Prevention and Disease Groups Based on Local Epidemiology<\/b><\/h3>\n

        In Vietnam, some vaccination programs, especially H5 avian influenza vaccination in risk areas, may be required or strongly recommended by local animal health authorities. Farmers should check the specific disease prevention vaccination plan of their province or city. Other vaccines may be applied flexibly depending on the region and epidemiological risk.<\/span><\/p>\n

        Disease groups commonly considered in many prevention programs, depending on the production model and local veterinary plan, include:<\/span><\/p>\n

          \n
        • Newcastle disease<\/span><\/li>\n
        • H5N1 and H5N6 avian influenza \u2014 required or recommended in many high-risk areas according to provincial\/city vaccination plans<\/span><\/li>\n
        • Gumboro disease, or Infectious Bursal Disease (IBD)<\/span><\/li>\n
        • Infectious Bronchitis (IB)<\/span><\/li>\n
        • Marek\u2019s disease, mainly in layers and pullets<\/span><\/li>\n<\/ul>\n

          Disease groups to vaccinate against based on local epidemiological risk and production model include:<\/span><\/p>\n

            \n
          • Fowl cholera<\/span><\/li>\n
          • Fowl pox<\/span><\/li>\n
          • Infectious Laryngotracheitis (ILT)<\/span><\/li>\n
          • Mycoplasma, including MG\/MS<\/span><\/li>\n
          • Salmonella, especially in table egg supply chains<\/span><\/li>\n<\/ul>\n

            Farmers need to clearly identify whether their production area has a history of any specific disease risks so that the schedule can be adjusted appropriately.<\/span><\/p>\n

            Classifying Schedules by Production Purpose: Broilers, Layers, and Pullets<\/b><\/h3>\n

            There is no single vaccination schedule for all chickens. The main differences are:<\/span><\/p>\n

              \n
            • Broilers:<\/b> The production cycle is usually 35\u201349 days depending on the target market weight. Disease prevention priorities focus on respiratory and digestive diseases in the early stage. Multiple booster doses are usually not required.<\/span><\/li>\n
            • Pullets:<\/b> These often require more booster vaccinations to prepare immunity before the laying stage, depending on production purpose, epidemiological risk, and veterinary advice.<\/span><\/li>\n
            • Layers:<\/b> Immunity needs to remain stable throughout the laying cycle, which often lasts 12\u201318 months depending on the model. Periodic booster vaccinations are usually needed.<\/span><\/li>\n<\/ul>\n

              How Production System Affects Vaccine Choice and Administration Route<\/b><\/h3>\n
                \n
              • Industrial closed-house production:<\/b> High stocking density and close contact increase the risk of rapid spread. Live vaccines through drinking water or spray are often prioritized to cover the whole flock evenly.<\/span><\/li>\n
              • Semi-free-range systems:<\/b> Birds have more contact with the external environment, so fowl pox and fowl cholera vaccines may need to be added depending on the region.<\/span><\/li>\n
              • Free-range production:<\/b> Risk of exposure to wild birds and natural water sources is higher. More frequent antibody monitoring and schedule adjustment based on the actual flock may be needed.<\/span><\/li>\n<\/ul>\n

                Vaccine administration route also varies by production system. Automatic drinker systems make drinking-water vaccination easier, while free-range farms often use eye drops or injection to control dosage more accurately.<\/span><\/p>\n

                Safety Principles and Limits of Applying a Vaccination Schedule Without Veterinary Advice<\/b><\/h3>\n

                Farmers can carry out many steps in the vaccination process on the farm, but several limits should be clearly understood:<\/span><\/p>\n

                  \n
                • The vaccination schedule in this article is for reference only. The actual flock condition, housing environment, and local epidemiological situation may require significant adjustment.<\/span><\/li>\n
                • Some special vaccines, such as ILT vaccines, may require ocular administration or eye-drop application according to manufacturer instructions. This technique requires direct guidance from a veterinarian. Subcutaneous injection techniques also need to be practiced properly before being applied to an entire flock.<\/span><\/li>\n
                • When the flock shows disease signs or abnormal losses, a veterinarian should be contacted before any change is made to the vaccination schedule.<\/span><\/li>\n<\/ul>\n

                  Vaccination Schedule Table for Chicks Aged 0\u20134 Weeks<\/b><\/h2>\n
                  \"A
                  The first four weeks are a critical period for developing early immunity against common poultry diseases.<\/figcaption><\/figure>\n

                  The Most Dangerous Diseases in Chicks That Should Be Prioritized From Day One<\/b><\/h3>\n

                  The period from 0 to 28 days of age is when the chick\u2019s immune system is not yet fully developed. Maternal antibodies gradually decline during the first 2\u20133 weeks, and chicks begin to depend on active immunity from vaccines. This is the most vulnerable period for:<\/span><\/p>\n

                    \n
                  • Newcastle disease (ND):<\/b> May cause mass mortality regardless of age.<\/span><\/li>\n
                  • Gumboro disease (IBD):<\/b> Attacks the bursa of Fabricius, the central immune organ in chicks, reducing their ability to respond to other vaccines if not controlled in time.<\/span><\/li>\n
                  • Infectious Bronchitis (IB):<\/b> Causes respiratory and kidney damage and may affect long-term flock health.<\/span><\/li>\n
                  • Marek\u2019s disease:<\/b> Especially important in layers and pullets. Marek\u2019s vaccine is a live attenuated vaccine, commonly using HVT or bivalent combinations, and is usually administered at the hatchery before chicks are delivered.<\/span><\/li>\n<\/ul>\n

                    Reference Chick Vaccination Schedule by Age<\/b><\/h3>\n\n\n\n\n\n\n\n\n\n\n
                    Age<\/b><\/td>\nDisease to Prevent<\/b><\/td>\nVaccine Type \/ Name<\/b><\/td>\nAdministration Route<\/b><\/td>\nNotes<\/b><\/td>\n<\/tr>\n
                    1 day<\/span><\/td>\nMarek\u2019s disease<\/span><\/td>\nLive attenuated Marek\u2019s vaccine, HVT or bivalent<\/span><\/td>\nSubcutaneous injection in the neck<\/span><\/td>\nUsually administered at the hatchery before chick delivery; not classified as an inactivated vaccine<\/span><\/td>\n<\/tr>\n
                    Day 1\u20133<\/span><\/td>\nNewcastle disease (ND)<\/span><\/td>\nLive Newcastle vaccine suitable according to product label and veterinary advice<\/span><\/td>\nEye\/nose drops<\/span><\/td>\nAvoid using strong strains in newly hatched chicks<\/span><\/td>\n<\/tr>\n
                    Day 3\u20135<\/span><\/td>\nInfectious Bronchitis (IB)<\/span><\/td>\nLive IB vaccine suitable for circulating strains and manufacturer\/veterinary guidance<\/span><\/td>\nEye drops or spray<\/span><\/td>\nMay be combined with ND if using a combined vaccine<\/span><\/td>\n<\/tr>\n
                    Day 7\u201310<\/span><\/td>\nGumboro disease (IBD)<\/span><\/td>\nIntermediate live IBD vaccine<\/span><\/td>\nDrinking water<\/span><\/td>\nWater intake may need to be controlled before drinking-water vaccination according to manufacturer or veterinary guidance<\/span><\/td>\n<\/tr>\n
                    Day 14\u201318<\/span><\/td>\nGumboro booster<\/span><\/td>\nIntermediate live IBD vaccine<\/span><\/td>\nDrinking water<\/span><\/td>\nSelection of intermediate or intermediate-plus IBD vaccine should be based on maternal antibody testing and veterinary\/manufacturer recommendations, especially in areas with high disease pressure<\/span><\/td>\n<\/tr>\n
                    Day 18\u201321<\/span><\/td>\nNewcastle booster<\/span><\/td>\nLive ND LaSota vaccine or combined ND+IB vaccine<\/span><\/td>\nDrinking water or eye drops<\/span><\/td>\nBooster to strengthen immunity<\/span><\/td>\n<\/tr>\n
                    Day 21\u201328<\/span><\/td>\nFowl pox, depending on area<\/span><\/td>\nLive fowl pox vaccine<\/span><\/td>\nWing web<\/span><\/td>\nApplied only if the area is at risk or birds are raised free-range<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

                    Note:<\/b> This is an example schedule commonly used in practice. The order and timing may vary depending on the vaccine strain, manufacturer instructions, and maternal antibody status of the flock. Consult the farm veterinarian before applying.<\/span><\/p>\n

                    Practical Notes for Chicks<\/b><\/h3>\n
                      \n
                    • Transport stress:<\/b> Newly arrived chicks often need 24\u201348 hours to stabilize temperature, water intake, and feeding before the first vaccination. Vaccinating too early when chicks are dehydrated or chilled may reduce immune response.<\/span><\/li>\n
                    • Beak trimming:<\/b> Do not vaccinate within 3\u20135 days before or after beak trimming because the birds are under stress.<\/span><\/li>\n
                    • Feed change:<\/b> Avoid changing feed and vaccinating at the same time.<\/span><\/li>\n
                    • House temperature:<\/b> Chicks need a stable house temperature, around 28\u201332\u00b0C depending on age and house design. Vaccinating when chicks are too cold or too hot may affect immune effectiveness.<\/span><\/li>\n<\/ul>\n

                      Vaccination Schedule for Broilers From Chicks to Market Age<\/b><\/h2>\n
                      \"Industrial
                      Broiler vaccination schedules are usually designed around a short production cycle and the expected market age.<\/figcaption><\/figure>\n

                      Characteristics of the Broiler Production Cycle and Disease Prevention Priorities by Week<\/b><\/h3>\n

                      Industrial broilers have a short production cycle, usually 35\u201349 days depending on the target market weight. Therefore, the vaccination schedule should focus on respiratory and digestive diseases that cause the greatest economic losses during this period, especially in the first three weeks.<\/span><\/p>\n

                      Disease prevention priorities by week:<\/span><\/p>\n

                        \n
                      • Week 1\u20132:<\/b> Newcastle disease, IB, and Gumboro disease have the greatest impact during this stage.<\/span><\/li>\n
                      • Week 3\u20134:<\/b> Gumboro booster and Newcastle booster.<\/span><\/li>\n
                      • Before market age:<\/b> New vaccines are generally not introduced close to market age unless specifically required by a veterinarian or competent authority. If any veterinary medicine is used at this stage, the withdrawal period on the product label must be observed.<\/span><\/li>\n<\/ul>\n

                        Reference Broiler Vaccination Schedule From Day 1 to Market Age<\/b><\/h3>\n\n\n\n\n\n\n\n\n\n\n
                        Age \/ Week<\/b><\/td>\nDisease to Prevent<\/b><\/td>\nVaccine Type<\/b><\/td>\nAdministration Route<\/b><\/td>\nNotes<\/b><\/td>\n<\/tr>\n
                        Day 1<\/span><\/td>\nMarek\u2019s disease<\/span><\/td>\nLive Marek\u2019s vaccine according to hatchery or breeder farm program<\/span><\/td>\nSubcutaneous injection<\/span><\/td>\nUsually performed at the hatchery or on day one; vaccine type should match the breeder farm program and veterinary advice<\/span><\/td>\n<\/tr>\n
                        Day 1\u20133<\/span><\/td>\nNewcastle + IB<\/span><\/td>\nCombined live ND+IB vaccine<\/span><\/td>\nEye drops<\/span><\/td>\nVaccine selection should match circulating strains, product label, and veterinary advice<\/span><\/td>\n<\/tr>\n
                        Week 1<\/span><\/td>\nGumboro disease<\/span><\/td>\nLive IBD vaccine<\/span><\/td>\nDrinking water<\/span><\/td>\nTiming should match the farm vaccination program and maternal antibody status<\/span><\/td>\n<\/tr>\n
                        Week 2\u20133<\/span><\/td>\nGumboro booster<\/span><\/td>\nLive IBD vaccine<\/span><\/td>\nDrinking water<\/span><\/td>\nBooster timing should depend on maternal antibody status, epidemiological risk, and veterinary advice<\/span><\/td>\n<\/tr>\n
                        Week 3\u20134<\/span><\/td>\nNewcastle booster + IB<\/span><\/td>\nND or ND+IB vaccine suitable according to product label and the farm vaccination program<\/span><\/td>\nDrinking water or eye drops<\/span><\/td>\nVaccine type and administration route should follow manufacturer or veterinary guidance<\/span><\/td>\n<\/tr>\n
                        Week 4\u20136<\/span><\/td>\nFowl pox<\/span><\/td>\nFowl pox vaccine<\/span><\/td>\nWing web<\/span><\/td>\nUsually considered depending on production model, epidemiological risk, and veterinary guidance<\/span><\/td>\n<\/tr>\n
                        According to local veterinary plan, if applicable<\/span><\/td>\nH5 avian influenza<\/span><\/td>\nH5 vaccine according to the official local vaccination program or competent authority guidance<\/span><\/td>\nAccording to product label and professional guidance<\/span><\/td>\nOnly implemented when included in the vaccination plan or instructed by competent local animal health authorities<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

                        Important note:<\/b> For short-cycle industrial broilers marketed at around 35\u201349 days, later pre-lay vaccinations such as ND+IB inactivated boosters, ILT, H5 boosters, or ND+IB+EDS before laying should not be included in the broiler schedule unless the flock is actually raised as longer-cycle birds, pullets, or layers under veterinary guidance.<\/span><\/p>\n

                        Adjusting the Broiler Vaccination Schedule When Market Age Is Shorter or Longer Than Usual<\/b><\/h3>\n
                          \n
                        • If birds are marketed before 35 days:<\/b> Focus on Newcastle and Gumboro vaccinations during the first three weeks. Late boosters may be omitted if stable immunity has already been achieved.<\/span><\/li>\n
                        • If the cycle lasts longer than 49 days:<\/b> For example, in crossbred or slow-growing free-range chickens, consider adding an ND booster at week 5\u20136 and possibly fowl cholera vaccination depending on the region. Consult a veterinarian to adjust the schedule appropriately.<\/span><\/li>\n<\/ul>\n

                          Comparison of Vaccination Schedules for Industrial Broilers and Free-Range\/Semi-Free-Range Broilers<\/b><\/h3>\n\n\n\n\n\n\n\n\n\n
                          Criteria<\/b><\/td>\nIndustrial Broilers, Closed Housing<\/b><\/td>\nFree-Range \/ Semi-Free-Range Broilers<\/b><\/td>\n<\/tr>\n
                          Common production cycle<\/span><\/td>\n35\u201342 days<\/span><\/td>\n60\u201390 days<\/span><\/td>\n<\/tr>\n
                          Diseases commonly prioritized<\/span><\/td>\nNewcastle, IB, Gumboro<\/span><\/td>\nNewcastle, IB, Gumboro; fowl pox, fowl cholera, and other diseases may also be considered depending on local epidemiological risk<\/span><\/td>\n<\/tr>\n
                          Typical vaccination intensity<\/span><\/td>\nUsually focuses on core vaccinations within a short production cycle<\/span><\/td>\nUsually requires more doses due to longer production time and higher environmental exposure<\/span><\/td>\n<\/tr>\n
                          Common administration routes<\/span><\/td>\nDrinking water, eye drops<\/span><\/td>\nEye drops, drinking water, injection, or wing web depending on vaccine type<\/span><\/td>\n<\/tr>\n
                          Risk exposure level<\/span><\/td>\nUsually easier to control in closed-house conditions<\/span><\/td>\nUsually higher due to greater exposure to the natural environment<\/span><\/td>\n<\/tr>\n
                          Notes when building a schedule<\/span><\/td>\nPrioritize a concise program suitable for a short cycle and main disease risks<\/span><\/td>\nAdjust the schedule according to longer production time, production system, and local epidemiological risk<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

                          Vaccination Schedule for Layers and Pullets<\/b><\/h2>\n
                          \"Layer
                          Layers and pullets require a longer vaccination program to maintain immunity before and throughout the laying period.<\/figcaption><\/figure>\n

                          Differences in Disease Prevention Goals Between Broilers and Layers\/Pullets<\/b><\/h3>\n

                          Layers and pullets have much longer production cycles than broilers, so they require more stable and long-lasting immunity. Diseases to prevent also include those that directly affect egg production, such as infectious bronchitis-related ovarian damage, mild Newcastle disease, and Egg Drop Syndrome (EDS).<\/span><\/p>\n

                          In addition, pullets need vaccination during the development stage to ensure sufficiently high antibody levels before laying. This protects the birds themselves and, in breeder flocks, helps transfer maternal antibodies to chicks later.<\/span><\/p>\n

                          Reference Vaccination Schedule for Pullets From Chicks to Pre-Lay, 0\u201318 Weeks<\/b><\/h3>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
                          Age \/ Week<\/b><\/td>\nDisease to Prevent<\/b><\/td>\nVaccine Type<\/b><\/td>\nAdministration Route<\/b><\/td>\nNotes<\/b><\/td>\n<\/tr>\n
                          Day 1<\/span><\/td>\nMarek\u2019s disease<\/span><\/td>\nLive attenuated Marek\u2019s vaccine, HVT or bivalent<\/span><\/td>\nSubcutaneous injection<\/span><\/td>\nBivalent Marek\u2019s vaccine is often prioritized for layers; administered at the hatchery<\/span><\/td>\n<\/tr>\n
                          Day 1\u20133<\/span><\/td>\nNewcastle + IB<\/span><\/td>\nCombined live ND+IB vaccine<\/span><\/td>\nEye drops<\/span><\/td>\nUse a mild vaccine strain according to product label and veterinary advice<\/span><\/td>\n<\/tr>\n
                          Week 1<\/span><\/td>\nGumboro disease<\/span><\/td>\nIntermediate IBD vaccine<\/span><\/td>\nDrinking water<\/span><\/td>\nVaccine selection should match circulating strains, product label, and veterinary advice<\/span><\/td>\n<\/tr>\n
                          Week 2\u20133<\/span><\/td>\nGumboro booster<\/span><\/td>\nIBD vaccine<\/span><\/td>\nDrinking water<\/span><\/td>\nDepending on maternal antibody status; consult test results and a veterinarian<\/span><\/td>\n<\/tr>\n
                          Week 3\u20134<\/span><\/td>\nNewcastle booster + IB<\/span><\/td>\nND or ND+IB vaccine suitable according to product label and the farm vaccination program<\/span><\/td>\nDrinking water or eye drops<\/span><\/td>\nVaccine type and route should follow manufacturer or veterinary guidance<\/span><\/td>\n<\/tr>\n
                          Week 4\u20136<\/span><\/td>\nFowl pox<\/span><\/td>\nFowl pox vaccine<\/span><\/td>\nWing web<\/span><\/td>\nUsually considered depending on production model, epidemiological risk, and veterinary guidance<\/span><\/td>\n<\/tr>\n
                          Week 6\u20138<\/span><\/td>\nH5 avian influenza<\/span><\/td>\nInactivated H5 vaccine<\/span><\/td>\nSubcutaneous injection<\/span><\/td>\nRefer to the provincial\/city official vaccination plan<\/span><\/td>\n<\/tr>\n
                          Week 8\u201310<\/span><\/td>\nNewcastle + IB booster<\/span><\/td>\nCombined inactivated ND+IB vaccine<\/span><\/td>\nIntramuscular or subcutaneous injection<\/span><\/td>\nStrengthens humoral immunity before laying<\/span><\/td>\n<\/tr>\n
                          Week 10\u201312<\/span><\/td>\nInfectious Laryngotracheitis (ILT)<\/span><\/td>\nLive ILT vaccine<\/span><\/td>\nEye drops<\/span><\/td>\nConsider only in high-risk areas or under veterinary guidance<\/span><\/td>\n<\/tr>\n
                          Week 14\u201316<\/span><\/td>\nH5 avian influenza booster<\/span><\/td>\nInactivated H5 vaccine<\/span><\/td>\nInjection<\/span><\/td>\nTiming and booster frequency for H5 vaccine must follow the official local avian influenza vaccination plan<\/span><\/td>\n<\/tr>\n
                          Week 16\u201318<\/span><\/td>\nNewcastle + IB + EDS<\/span><\/td>\nCombined inactivated ND+IB+EDS vaccine<\/span><\/td>\nIntramuscular injection<\/span><\/td>\nImportant pre-lay dose; should be given at least 4 weeks before laying<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

                          Booster Vaccinations During the Laying Period According to Veterinary Recommendations<\/b><\/h3>\n

                          After birds enter lay, immunity should be maintained through periodic boosters:<\/span><\/p>\n