Also quality control. I never had the flu shot until recent years and never got what I would have known, anyway, were flu symptoms....probably just attributed any bad aches and pains, lumpy throat, etc. to other normal illnesses. But I've had the flu shot for the last 4 years and haven't had the flu nor even those other prior symptoms either....and I'm definitely in the compromised age group w/ compromised system in general. My husband had to take the flu shots during his military career and always got sick. He's taken the flu shot also now for past 4 years under current great doctor and not gotten sick....but nothing is ever forced in our case anyway....only asked. If people don't want them they should just refuse them. Like a lot of doctors.....several in extended family.....who feel that they had to finally give in to mothers for years who insisted on the gazillion antibiotics for children or themselves which of course also lessened the degree to which the natural immune system could fight things off. I knew of several women friends over the past decades who, even after testing were told their sore throats were not strep but they wouldn't accept and would go to another doc to get what they wanted....more antibiotics! A friend whose sister is a PhD nurse practitioner in NY, doing lots of tests on the various treatments for this COVID-19 just told me that her sister said DO NOT take Ibuprofen for it.....causes it to greatly worsen!