Cat vaccination cannot 100% prevent virus infection. It is still possible for cats to be infected by viruses due to the following main factors:
1. Newborn kittens receive their initial immunity through breast milk, which contains maternal antibodies.
At this time, vaccinating the kitten may cause the vaccine's protective effect to be compromised.
2. Vaccines generally take about 10 days after injection to reach maximum protection.
If the cat is already infected with the virus before the vaccine reaches its maximum protective effect, the vaccine may fail.
3. If the cat has a congenital immune deficiency, an immunosuppressive disease,
or is infected with internal parasites, it may also lead to vaccine failure.
4. If the cat has an adverse reaction before the vaccine reaches its maximum protective effect,
or if the vaccination is not completed on time, or if the vaccine is not stored properly,
it may lead to vaccine failure.
5. If the triple vaccine is not fully administered or if all protective antibodies have not been formed within 16 weeks of the third shot, the body may not be able to fully resist viral invasion.
