Here's a study that challenges one of my assumptions about air travel. I thought once in the air, #COVID19 risks were lower due to air filtering. Apparently not. This STUDY is based on flights before vaccines were available.
"Compared to short flights without masking, medium and long flights without masking were associated with 4.66-fold increase and 25.93-fold increase in incidence rates, respectively..." (1/2)
"... long flights with enforced masking had no transmission reported. A 1 h increase in flight duration was associated with 1.53-fold increase in the incidence rate ratio (IRR) of cases." (2/2)
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