The only recourse left for governments would then be calling in the army. This might become problematic for many members of the army, as in most so-called democracies, the army takes an oath not to fight against its compatriots, the people of the very country they were recruited to defend.
One such country that has abandoned all principles of democratic and civil freedom is Australia, where the army forcibly throws Covid-exposed, or suspected Covid-exposed people (like Australians returning from abroad) into quarantine camps; and where the chief medical officer warns the unvaccinated, “Your life will be miserable”.
According to this CBS report, Australia has ceased to be a free country (7 min. video).