Los Angeles County has 200,000+ with Wu antibodies
LOS ANGELES ‐ Hundreds of thousands of Los Angeles County residents may have been infected with the coronavirus by early April, far outpacing the number of officially confirmed cases, according to a report released Monday.

The initial results from the first large-scale study tracking the spread of the coronavirus in the county found that 2.8% to 5.6% 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, according to the researchers conducting the study, even though the county had reported fewer than 8,000 cases at that time.
This is at least the 4th USA study to produce the same 'many, many people had it' result which would show that the Wu is far more communicable but far less lethal than estimated previously.