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Yes, that's why we will never know the true scale of the problem...

SW-User
@HootyTheNightOwl Scientists are working on methods of tracking the virus better (see my reply about detecting antibodies). It's a ways off, but eventually they'll be able to have a clearer idea of just how many people were infected, including ones who showed no symptoms. This will, in the short term, help to track and contain it, and in the long term, hopefully, help us prepare better for future outbreaks (which epidemiologists have ensured us are inevitable -- if not another coronavirus, then a new form of influenza, or something else). We need this information so the next outbreak doesn't catch us with our pants down like this one did.