SARS back in 2002 only lasted 3 flu seasons before being entirely wiped out naturally.
SARS-CoV-2 which we are dealing with here is a related virus.
> No cases of the first SARS-CoV have been reported worldwide since 2004.
https://en.wikipedia.org/wiki/Severe_acute_respiratory_syndr...
> Naturally-occurring herd immunity is a temporary effect.
Reply:
> No cases of the first SARS-CoV have been reported worldwide since 2004.
No I very much intended to write it here. Which part of this interaction needs more explaining?
> was extraordinarily costly
No it wasn't, the costs were were a rounding error on the global economy scale[1]
> The calculations above suggest that the cost in 2003 of SARS for the world economy as a whole are close to $US 40 billion
[0] https://en.wikipedia.org/wiki/2002%E2%80%932004_SARS_outbrea...