I personally believe that the government does have a role in preventing contagion, just like they have a role in preventing crime and preventing war and preventing the risk of people who drive too fast.  One person putting excessive risk on another against that other's will.... that is a valid purpose of government.  Of course the specifics would be a mess to work out... how fast is driving too fast?  how bad of a disease does it have to be for the government to quarantine you?  how big of a gun is too big?  The fact that I posit these questions means I'm not a minimalist libertarian/anarchist.  It means I don't believe that we have as a species worked out how to co-exist in peace without some form of dominance hierarchy (government officials have power over plebians) oppressing us all.  If you have worked out a better solution I'm all ears because government sucks compared to free markets.. But a lack of government sucks more.

What happened wrong with COVID was that they all over-reacted to a minor disease (because they secretly knew it was from weapons research and that freaked them out) and decided to coerce people to take a risky rapidly developed medical product.