Talking is sufficient.
Take this into account while planning for school reopenings.
Inside, all day, close up?
Visualizing Speech-Generated Oral Fluid Droplets | NEJM nejm.org/doi/full/10.10…
Cohorting...
Limiting time together...
More layers of prevention = better.
What would I most favor as a parent? Small cohorts + outdoor education. Give kids room to move, an opportunity to socialize in small, static groups...
We can try to engineer classrooms to mitigate risk, and we should.
But being outside offers ready-made advantages (space, ventilation, sunlight...the activity that has been curtailed during stay at home).
Of course this is not possible...