“For all we know, only a fraction of those that have the virus are even tested, and then only because they are showing significant symptoms.”
Actually, we have an entire population that was tested. Everybody aboard the Diamond Princess was tested during and after the outbreak. So we know pretty accurately the distribution of symptom severity.
Right now in NYC only the serious and critical cases are being counted, but that is due to process, not lack of cases. It does pollute the data from NYC quite a bit. What ever the case count in NYC, assume it is 20% of the actual cases (active cases, not incubating cases).
MD
Maryland Gov. Larry Hogan said in a national TV interview that Maryland would look “a lot more like New York” by Easter.
Metro has announced further cuts to bus and rail service for the coming workweek.
A nursing home in Mt. Airy, Maryland, has been hit with an outbreak of COVID-19, the disease caused by the novel coronavirus, with 66 residents testing positive. The county health officer announced Sunday that one resident, a man in his 90s, has died.
https://wtop.com/coronavirus/2020/03/coronavirus-update-dc-maryland-virginia-march-29/
Actually, we have an entire population that was tested. Everybody aboard the Diamond Princess was tested during and after the outbreak.