Is the Coronavirus as Deadly as They Say?

The title is from a WSJ article a month ago, but it's pay-walled. Several other sites have reported the study in the last few days. The first is for the public, other two more skeptical science reports.

Non-peer reviewed study from Stanford found rate of virus may be 50 to 85 times higher than official figures
https://www.theguardian.com/world/2020/apr/17/antibody-study-suggests-coronavirus-is-far-more-widespread-than-previously-thought

Antibody tests suggest that coronavirus infections vastly exceed official counts https://www.nature.com/articles/d41586-020-01095-0
In Pursuit of Real Coronavirus Numbers https://www.medscape.com/viewarticle/928954
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The study from Stanford University, which was released Friday and has yet to be peer reviewed, tested samples from 3,330 people in Santa Clara county and found the virus was 50 to 85 times more common than official figures indicated.

To ease the sprawling lockdowns currently in place to stop the spread of Covid-19, health officials must first determine how many people have been infected. Large studies of the prevalence of the virus within a region could play a key role, researchers say.

That also means coronavirus is potentially much less deadly to the overall population than initially thought. As of Tuesday, the US’s coronavirus death rate was 4.1% and Stanford researchers said their findings show a death rate of just 0.12% to 0.2%.

The study has been interpreted by some to mean we are closer to herd immunity – the concept that if enough people in a population have developed antibodies to a disease that population becomes immune – than expected. This would allow some to more quickly get back to work, a strategy currently being deployed in Sweden. But researchers behind the study said not to jump to conclusions or make policy choices until more research has been done.