Yes, after a big outbreak. I was talking about the time, when there were a few single cases. In Munich, this worked once, in Heinsberg, it mostly worked, but th

Yes, after a big outbreak. I was talking about the time, when there were a few single cases. In Munich, this worked once, in Heinsberg, it mostly worked, but there the spread was larger due to the infected attending an event. And a lot of cases in Germany were caused by one person in Ischgl which acted completely foolish.