[loftyal]

Wont we achieve herd immunity via natural infecion then? Unless the virus starts to become like flu, which evades the the natural immunty very easily.

[bananapub]

if the problem is that the immune response drops too low to prevent infection then there may be no herd immunity from that either, it can just cycle around.

[nradov]

With highly contagious diseases, herd immunity is kind of a meaningless concept. Eventually close to 100% of people get infected.