Some of us with good memories will remember the announcement that our small pox vaccine may have worn off several years ago. Well it has worn off and we have sort of forgotten about that minor detail. We don't see remnants of even the few small pox survivors anymore. Like Joeseph Stalin they died off years ago. (he was horribly small pox scared but his propoganda pictures were all airbrushed.)
Why vaccinate for a disease that doesn't exist?
Because it does exist and when frozen, is very patient.

Looking ahead 'anti vaxxers' would face the delemma of seeing is believing. Compared to the silence of the Covid dead and dieing, small pox is in your face.