German virologists say that the statistic in Italy show that Corona must already have spread around there in January with no one noticing. There also has to be a high dark figure (number of unknown cases) as otherwise the death rate would be unusually high.
The number of undetected mild cases (which are nevertheless contagious to others) is also a problem in other countries. The virologists say it is simply impossible to carry out enough tests per day to detect all cases with minor symptoms.
What I‘m angry about is that the media and also the German board for epidemics comminicated that simple mouth nose masks are useless. NOW they begin to admit that they are useful against infection by flying drops - the main type of infection with Corona. But most people in Germany also have a stupid „stay cool“ attitude, they laugh at anyone who wears a mask, and the biggist disaster is the shortage of masks among doctors and hospitals, a consequence of cost efficiency and just-in-time delivery.