LyrArc Article Gist
With coronavirus spread out over wide parts of each country and with so many people infected it is very difficult to do the contact tracing and isolation that was tried during the first wave. In Germany during the first wave efforts for contact tracing and isolation worked reasonably well. During the second wave in November things have changed. In Germany authorites do not know in November where 75% of the people testing positive for coronavirus got it. In Spain this figure is 93% for the last week of October. In France and Italy it is at 80%. In New York it is over 50%.

Other problems are the increasing number of cases where the coronavirus is spread in an home setting, the lack of restaurant data collected on who visits, and the delay in getting test results. In Germany frequently people say they cannot remember where they were. Researchers from the German version of the FBI, the Pasteur Institute in France and the Koch Institute in Germany are getting involved in November to understand in what settings the virus spreads most.