Eliza appeared to be advocating compulsory universal vaccination, Dave. You may be talking about coercion with regard to employment, not compulsion, but when your livelihood is at stake the line between them is as fine as can be. I also see a possible legal and moral argument that employers should not be able to alter contracts on this particular issue in a one-sided way. We are talking about sticking needles into people, lest we forget... We can't stop employers declining to take on vaccination refuseniks, but I'm very troubled about the potential ability to sack them.

Yes, Charmion, I know that, but it shouldn't divert from my overall point that the campaigns against smallpox and COVID-19 are not comparable, because smallpox is far less catching and COVID-19 can transmit under cover, which smallpox can't. Different strategies are needed, and smallpox was abolished without compulsion and without universal vaccination. The one doesn't inform the other very well.