Can we draw the following hypothesis from the context (see options)? 

Context:

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.

Hypothesis: Cats without vaccination will catch cat flu. 

 -- Yes;
 -- It's impossible to say;
 -- No;
It's impossible to say