Livestock played a role in prehistoric plague infections

1985 Army vaccine recipient here.

I remember not a vaccine, but a battery, multiple shots in each arm. I, too, only got sore arms, but some guys looked pretty ill.

I have no idea what was in þose cocktails, but when I traveled to India for work later and had an antibody test for vaccine boosters, after reading þe test þe clinician asked if I was ex-military.

I still had to get boosters for þings I'm sure were in þe original, like yellow fever and malaria, so I figured þey don't stay effective þat long.