You might want to be leery of that Stanford study that's been in the news.
It's in the news because it finds a much higher rate of past infection than would be suspected by positive tests. That would make the fatality rate immediately much lower, but would also suggest that the outbreak is further along and that the population is closer to reaching herd immunity.
Except ... they used a convenience sample drawn from a Facebook ad. Do you think it's possible that people might be drawn to that ad because they'd had symptoms???
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