Biotech Values

[mouton29]

<<Ugur Sahin… "it could take a decade to beat Covid-19">>

That follows from this belief:

I assume that we will only be done with this virus when more than 90% of the global population will get immunity, either through infection or through a vaccine,

Why so high a threshold for herd immunity? I understand it may take a while to die out even after herd immunity is reached.