And they are only testing people who believe they may be infected. Not those who have no symptoms or those who may have already recovered months ago. We do know what we don't know. Caution is warranted but those with an agenda could use this to mislead.
Thing about people with no symptoms... is that they spread the virus just like anybody else. And if you don't test them, you can'tquarrentine them.
This is why massive testing (like Germany has done) is important. Without it, you will *not* stop the spread. You may slow it, but that may not be enough to avoid a fucking catastrophe.