Is two doses of the feline triple vaccine effective?
Yes. If you calculate that the kitten will receive its third dose after four months of age, then only two doses of the feline triple vaccine are needed. However, normally, kittens receive their first dose of the triple vaccine at 56 days old, followed by the second dose 21 days later, and then another 21 days later. This means that the kitten receives its third dose of the triple vaccine and a rabies vaccine at three months old. After that, it receives a rabies vaccine and a feline triple vaccine annually. 
The feline triple vaccine is an inactivated vaccine that protects against feline rhinotracheitis, feline calicivirus, and feline panleukopenia. Generally speaking, it prevents feline panleukopenia, calicivirus, and feline herpes simplex virus. The vaccine is made by inactivating the virus; when injected into a cat, it stimulates the immune system to produce corresponding antibodies. When the cat is exposed to the virus again, its body will produce the corresponding antibodies to fight it off. Vaccination can usually begin when the kitten is two months old. The first dose requires three consecutive injections of the feline triple vaccine, with each injection approximately 21 days apart. If the kitten exhibits symptoms such as lethargy, poor appetite, sneezing, loose stools, or diarrhea, vaccination should only be postponed until the kitten has fully recovered. Domestic cats are more susceptible to infection due to viruses carried on their owners' clothes and shoes during frequent outings; therefore, even indoor cats must be vaccinated.
