https://www.latimes.com/california/story/2020-04-20/coronavirus-serology-testing-la-county
"The initial results from the first large-scale study tracking the spread of the coronavirus in the county found that 4.1% of adults have antibodies to the virus in their blood, an indication of past exposure.
That translates to roughly 221,000 to 442,000 adults who have recovered from an infection, once margin of error is taken into account, according to the researchers conducting the study. The county had reported fewer than 8,000 cases at that time.
The findings suggest the fatality rate may be much lower than previously thought. But although the virus may be more widespread, the infection rate still falls far short of herd immunity that, absent a vaccine, would be key to return to normal life."
“Any way you slice the data ... it’s clear that herd immunity in this situation does not apply. It’s still way below that level,”
"The mortality rate is based on the number of confirmed infections; the higher the number of infections, the lower the fatality rate. Both studies estimated a mortality rate of 0.1% to 0.2%, which is closer to the death rate associated with the seasonal flu."
“If this mortality were to continue for the whole year — we hope it doesn’t, but if it did — COVID would be the leading cause of death in Los Angeles County,”
"Neither the Stanford nor USC studies have been vetted by the typical peer review process, and their initial conclusions have been fiercely debated."
