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For Herd Immunity to be effective you need at least 90%-95% of people to have immunity. Exposure to other coronaviruses will do nothing for you against this specific new coronavirus.
Without a vaccine then the only way to have immunity will be to have had this specific virus and survived. Given it has a case fatality rate of ~1% you'll only get to 90% herd immunity levels in the population once a good 700,000 people have died.
Greenbank-
Yeah that's what I meant, as dicki mentioned the long term resistance that might help with future coronaviruses. The next virus is different again, so no.
The fatality rate is probably also due to so many people having it at once, so if it passes through the population slower, as some have visioned, it might not be so high. But I know so little about this that if others have more insight, I'll stop now.
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For Herd Immunity to be effective you need at least 90%-95% of people to have immunity. Exposure to other coronaviruses will do nothing for you against this specific new coronavirus.
Without a vaccine then the only way to have immunity will be to have had this specific virus and survived. Given it has a case fatality rate of ~1% you'll only get to 90% herd immunity levels in the population once a good 700,000 people have died.
90-95% for something like measles which is extremely contagious (and was achieved)
I'm not going to postulate on this virus because it would all be hypothetical crap. Safe to say it's less.
Samuli
bright
SARS and MERS were apparently somewhat similar coronaviruses too. So even if you'd be immune to this, the next version of the virus is probably just different enough. But apparently herd immunity is the way to get through this pandemia indeed.