DIY-HP-LED
Well-Known Member
What the cruise-ship outbreaks reveal about COVID-19
Close confines help the virus to spread, but closed environments are also an ideal place to study how the new coronavirus behaves.
www.nature.com
Don't read spanish and I was speaking of the IFR, useful for calculating the total number of infections using the most reliable metric, so far. The CFR is a different matter but since you mentioned it:
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"Another team used data from the ship to estimate2 that the proportion of deaths among confirmed cases in China, the case fatality rate (CFR), was around 1.1% — much lower than the 3.8% estimated by the World Health Organization (WHO).
The WHO simply divided China’s total number of deaths by the total number of confirmed infections, says Timothy Russell, a mathematical epidemiologist at the London School of Hygiene and Tropical Medicine. That method does not take into account that only a fraction of infected people are actually tested, and so it makes the disease seem more deadly than it is, he says.
By contrast, Russell and his colleagues used data from the ship — where almost everyone was tested, and all seven deaths recorded — and combined it with more than 72,000 confirmed cases in China, making their CFR estimate more robust. The results have been posted on the biomedical preprint server medRxiv, and have not been peer-reviewed yet".
"The group also estimates that the infection fatality rate (IFR) in China — the proportion of all infections, including asymptomatic ones, that result in death — is even lower, at roughly 0.5%. The IFR is especially tricky to calculate in the population, because some deaths go undetected if the person didn’t show symptoms or get tested"