So you don't accept the Leicester document at face value because...

So you don't accept the Leicester document at face value because it is 100 years old, but you accept Jenner's documents at face value even though they are more than twice that age?

Can you explain your logic there?

BTW, if polio vaccinations had any effect on polio, it was only to keep the disease going beyond its natural lifespan. Like cowpox vaccinations.