If you REALLY don't think she'll stop, just claim you already got it for free, while acting very pissy about it. Of course you'd also have to act sick for a few day or two as well, but unless she's totally deranged I wouldn't expect her to actually demand proof or verification.

Not that I could stomach even pretending to give in like that myself.

A fun argument you could try is to point out any weight or lack of physical fitness. Because honestly, assuming that the vaccine will magically protect an already unhealthy person from any chance of infection is just fucking absurd.

If you REALLY don't think she'll stop, just claim you already got it for free, while acting very pissy about it. Of course you'd also have to act sick for a few day or two as well, but unless she's totally deranged I wouldn't expect her to actually demand proof or verification.

Not that I could stomach even pretending to give in like that myself.