Or to go to a restaurant and prove you have a flu vaccine?
Or tuberculosis exam as it also spreads via the air from an infected person?
What about if you haven't been able to get the vaccine (like my girlfriend which she is stuck in a fucking bureaucratic limbo due to most public services not working due to.. well guess what, COVID lockdowns) and not being able to be part of everyday life?
And I really dislike the 'well we have mandatory things already, so why not this also?' way of thinking. If now to enter a restaurant we required a rectal exam, it should be ok right? you already have a driving license so we should be able to ask anything else based on that alone