How to prevent feline upper respiratory illness<br>Get your cat vaccinated. Vaccination against cat flu is considered an essential vaccine. The flu vaccine needs to be given regularly and it comes in a variety of types (modified live, modified live intranasal, killed vaccine) which determines how often the vaccine needs to be given.
The flu vaccine does not need to be given regularly. 
( z1 need :polarity - :ARG1 ( z2 give :ARG1 ( z3 vaccine :purpose ( z4 disease :name ( z5 name :op "influenza" ) ) ) :ARG1-of ( z6 regular ) ) )