Covid-19 coronavirus: Superspreader - woman infects 71 people in 60 seconds in elevator: CDC study

One asymptomatic carrier rode an elevator alone, then 71 people got Covid-19. She did everything right. She had no symptoms, but she self-quarantined anyway after travel. She stayed in her apartment. She ordered-in food. But she became patient zero in a 71-case cluster. Intensive contact tracing is not just helping head-off Covid-19's spread. It's revealing just how crazy infectious the virus can be. A new study released by the US Centres for Disease Control (CDC) analysed the impact a single traveller – with no symptoms – can have. It also reveals the pitfalls of high-density living.