CALIFORNIANS MAY HAVE DEVELOPED SOME HERD IMMUNITY TO CORONAVIRUS LAST YEAR, STANFORD TEAM THEORIZES

[DeminPennswoods]

119. The observable evidence points to population density

Last edited Sun Apr 12, 2020, 07:14 AM - Edit history (1)

and consistent exposure to cv19 as the most likely causes of severe symptoms. You need only look at the hot spots like NYC, hospitals, nursing homes, assisted living facilities, jails and other places where people are in close quarters. This leads me (not a scientist) to think that the load or dose of the virus needed to cause severe symptoms is high, that you do not necessarily get sick or very sick from casual contact with the virus. If the load or dose needed was low, then given the number of confirmed cases, there would be many, many more hospitalizations and deaths.

FTR, I don't believe the "herd immunity" theory for CA, but I think it's entirely possible cv19 has been circulating in the US for longer than anyone thinks. Neither zoonotic diseases nor coronavirus carrying fauna are limited to China. Since most of the cv19 symptoms are the same as for flu, we cannot rule out that some cv19 cases were considered flu or some other respiratory disease during the winter flu season. The common cold is a coronavirus. Isn't it possible some people have at least some immunity based on exposure to colds over a lifetime?