4 in 5 *ASYMPTOMATIC*! New evidence has emerged from large majority of #COVID19 infections do not result in symptoms. That around four in five infections caused no illness. Many experts believe that this could be an important source of contagion. https://www.bmj.com/content/369/bmj.m1375

2) that said, this comes from a small report in China: “A total of 130 of 166 new infections (78%) identified in the 24 hours to the afternoon of Wednesday 1 April were asymptomatic, said China’s National Health Commission.” #COVID19

3) In the past, Iceland mass testing studies indicate asymptomatic is around 50%. CDC says 25% asymptomatic. #COVID19