I was recently in France, attending to the Royal Canin 1st International Shelter Convention. A great event for two reasons : 1/ it was in South of France (and who would not want to be in South of France beginning of June, such a beautiful weather !!! ) ; 2/ it was an opportunity to meet people involved in shelters from all over the world and discuss with them about the challenges they face ( see pictures from the event here ).
What it means for animal shelters
Why do I find this relevant information ? Because when you give it some thoughts, you quickly realize that the quarantine (=period during which we observed if the animal is gonna get sick) should merely be a concept in shelter environments.
Indeed, length of the quarantine should be based on the incubation period of the considered disease (because if they are not sick after this period, they were probably not infected when entering the shelter). But at the same time, we also know that the longer the animals stay inside the shelter, the more risks to develop infectious diseases. That is especially true for cats, their high susceptibility to stress making them more fragile in shelters.