Thread by @MikeOtsuka

New paper👇on another superspreader event involving a choir. This one in France on 12 March. Choir practice in indoor non-ventilated room 45m2. Infection spread to 70% of 27 participants. 1/
medrxiv.org/content/10.110…

The paper also mentions multiple superspreader events involving choirs👇. 2/

One cannot rule out the possibility that spreading occurred only or mainly as the result of close contact (<2m) mingling of the infected w/ others when not standing/sitting in place & singing. E.g., before or after rehearsal or during breaks. 3/

But there are many other meetings where people mingle & talk to a greater extent (e.g., receptions). Yet there are not high numbers of superspreader events tied to such meetings. Rather, superspreading tends to crop up in events involving loud talking (e.g., clubs) & singing. 4/

This suggests that aerosol transmission over greater than 2m, via the especially high volume of droplets & aerosol one emits when singing or speaking loudly, is the more likely cause. (@jljcolorado) 5/5