Given the current problems over vaccine hesitancy which will result in further delay to unlocking, a resumption of international travel and the ability of professional pilots to earn a living, shall we leave such banter to the pub? There is no compulsion to be vaccinated so if a registered doctor prescribes a vaccine not licensed in your regulator's country and you do not fly for 48 hours there is no risk from your regulator as it is not proscribed. Vaccines and drugs must be prescribed but many prescribed drugs are off license and so uncertified. All administered vaccines in the western world have an emergency use authorisation or equivalent. Drugs are licensed but not certified and certainly not approved although other bodies such as NICE may recommend. There is no such status as test and no legal ramifications for vaccines as all countries have accepted national and sole liability for complications.
I would have thought pilots would be promoting Covid vaccination to save their livelihoods.....