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Because the virus can propagate asymptomatically. And even in the best performing countries, only symptomatic people are being tested.
by greedo 7y ago
Because the virus can propagate asymptomatically. And even in the best performing countries, only symptomatic people are being tested.
- aty268 7y agoOf course, that is the explanation for the exponential growth in the early stages. US citizens don't care right now. Once the virus grows, people will start being more careful, whether they have symptoms or not, because they don't want to get the virus. This along with some government intervention and businesses closing shop will destroy the exponential growth, as we see with China and will soon see with Italy.
- learc83 7y agoEven if it is possible, there's no evidence that shows that asymptomatic transmission is common enough to be a significant factor.