Grandparent comment is almost certainly referring to the Case Fatality Rate. South Korea is a better example, due to widespread testing (there was a lot of self-selection on cruise populations).

CFR of 3% - 5% for unprepared areas is not unreasonable. 0.6% is closer to the South Korean experience. https://github.com/CSSEGISandData/covid-19

Yes, but my specific question was: where did they get a CFR of 0.2% from?

SK's CFR[1] is currently 0.9% (8,162 cases; 75 deaths).

I haven't seen any source (or reputable estimate) that indicates a 0.2% CFR. So I'm asking for a citation or reference for where that number came from.

[1] data from John's Hopkin's tracker: https://www.arcgis.com/apps/opsdashboard/index.html#/bda7594...

Death rate != CFR.

CFR is the fatality rate for diagnosed people and it's gonna swing wildly depending on how many people are tested and diagnosed. And considering how this virus affects young and healthy people, there's good reason to believe that a lot of people get infected and never seek out medical assistance and never get diagnosed.

Even the best numbers we have are often skewed and misleading - as an example, we have a lot of good data from the cruise ship quarantined in Japan, but cruise passengers do not match the demographics of the general population.

Chloroquine may explain why South Korea has low CFR

https://youtu.be/U7F1cnWup9M?t=891

Really promising and excellent video. I hope chloroquine (or hydroxychloroquine) proves to be effective in emergency clinical trials. And that it can be readily sourced for upcoming patients if so.

All researchers, doctors should see this video & cited papers to evaluate potential.

From the CDC:

"but a broad range of 0.25%–3.0% probably should be considered."

https://wwwnc.cdc.gov/eid/article/26/6/20-0320_article

But even that isn't really responsive.

The parent said the death rate (without care) jumps from 0.2% to 3% (with care) as if both numbers were known.

An article saying that the death rate (with care) could range anywhere from 0.25%-3.0% seems...like not a solid foundation to make the claim the parent commenter made.

IIRC Diamond Princess tester people gradually over a prolonged period. They declared that anyone who tested negative at any point was obviously still negative when they got off the ship.