Finding coronavirus superspreaders may be key to halting a second wave

While there is no universally agreed definition of a superspreading event, it is sometimes taken to be an incident in which someone passes on the virus to six or more other people. Getting to the bottom of why these puzzling clusters occur could be key to gaining control of the covid-19 pandemic and stopping a second wave of cases.

German Health Expert Karl Lauterbach: "The Authorities Should Focus Their Efforts on Super-Spreaders"

I am in favor of adopting Japan's strategy, which has proven most effective in the fight against super-spreaders. The Japanese didn't impose a strict lockdown during the first wave, but they were roughly as successful as we were. That is exactly what we need for the second wave. The virologist Christian Drosten (one of Germany’s leading figures in the COVID-19 crisis) also sees this strategy as the correct course of action.

How ‘Superspreading’ Events Drive Most COVID-19 Spread

As scientists have learned more about COVID-19, it has become clear that so-called superspreader incidents—in which one person infects a disproportionate number of other individuals—have played an oversized role in the transmission of the virus that causes the disease.

K number: what is the coronavirus metric that could be crucial as lockdown eases?

K sheds light on the variation behind R. “Some [infectious] people might generate a lot of secondary cases because of the event they attend, for example, and other people may not generate many secondary cases at all,” said Dr Adam Kucharski. “K is the statistical value that tells us how much variation there is in that distribution.”