So quick recap via google...

Human endogenous retroviruses (HERVs) are a family of viruses within our genome with similarities to present day exogenous retroviruses. HERVs have been inherited by successive generations and it is possible that some have conferred biological benefits.



Now - the downside to HERV? NONE OF US, none, no-one, has or can ever have, any immunity to these re-activated viral strains.


Why? BECAUSE THE BODY WON'T ATTACK THEM AS FOREIGN EVEN IF THEY ARE KILLING US.