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My cat has flu. Can my vaccinated kitten catch it after exposure?

Updated On September 23rd, 2025

Pet's info: Cat | Mixed Breed | Female | spayed | 7 lbs

Hi, I recently adopted an adult (4 yr old) cat and have kept her separate (though they have been in the same rooms, just not at the same time) from my kitten (5 mth old). It turns out that the cat has cat flu. She was diagnosed the same day that my kitten got his last/third F3 vaccine. My question is: is it likely that my kitten has been infected, or will likely be infected when they do meet? I'm worried about them both having complications as senior cats.

1 Answer

Most Helpful Answer

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Answered By Lindsey Edwards MVB, BSc, IVCA

Veterinarian

Published on October 27th, 2017

The vaccines your kitten has received should provide some protection against contracting the 'flu' (which is a complex disease in cats and can be a result of a number of different viruses and bacteria such as chlamydia and not all types are in the vaccines). No vaccine will prevent exposure or 100% protection against illness but they do reduce the severity and duration of illness. Infected cats can shed the viruses for months but I would not allow them to meet until 7-10days after symptoms have resolved

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