Obviously it is impossible to avoid germs completely – so most people think it is purely luck whether they catch them.
But you don’t catch an illness from just one virus – you get ill when lots of viruses enter your body and you cannot cope with them.
You can’t avoid picking up all viruses, but if fewer viruses get into your body, you will have a chance to fight back against them.
This means you don’t have to avoid ALL viruses. Avoiding as much virus as you can will help protect you from becoming seriously ill.