Please don't take this as being directed explicitly towards your comment. But why does anyone think there is such a thing as herd immunity for Covid-19?
I've been following the research since December/January on New England Journal of Medicine, Virological.org, Lancet etc. And I think there is not yet enough evidence to suggest that there is immunity conferred by contracting Covid-19.
If there is no immunity or limited immunity conferred from infection then Covid-19 will be with the USA and other countries that have given up on control measures for a long time.
> But why does anyone think there is such a thing as herd immunity for Covid-19?
I suppose this depends on what the null hypothesis is? Is the null hypothesis "You have immunity after being infected" or is it "You don't have immunity after being infected". You assume it's the latter and you're saying there's not enough evidence to reject it. But you could just as well assume it is "You have immunity after being infected" and we're gathering evidence to see whether that can be rejected or not.
I've been following the research since December/January on New England Journal of Medicine, Virological.org, Lancet etc. And I think there is not yet enough evidence to suggest that there is immunity conferred by contracting Covid-19.
Does anyone know of any studies claiming that "herd" immunity is even possible with Covid-19? The latest article I could find is: COVID-19 and Postinfection Immunity https://jamanetwork.com/journals/jama/fullarticle/2766097
If there is no immunity or limited immunity conferred from infection then Covid-19 will be with the USA and other countries that have given up on control measures for a long time.