We take Fister to a pension (cathotel), it's expensive but we know he's safe and well looked after. We hate to leave him, but we don't like strangers in out flat either. The "cathotels" here demand to see a vaccination paper, or they won't take any cats in, so there should be no risk they get infected.

I think the best would be if you have a close friend or relative to come and check/feed every day. Cats are so much happier in their own environment.

Best of luck finding the right solution!