SV40.

"SIMIAN VACUOLATING VIRUS 40"

Aka monkey virus, yeah, you can't make this shit up...

Is literally the reason cancer has proliferated since the polio VaCcInE in the 50's.

https://en.m.wikipedia.org/wiki/Vaccine_contamination_with_SV40?origin=serp_auto

How many other vaccines is SV40 in?