Thread: This CDC report shows that people who are asymptomatic can spread the infection and later become symptomatic. So testing only symptomatic persons misses at least half the cases of infection. https://www.cdc.gov/mmwr/volumes/69/wr/mm6913e1.htm

77% of those who were asymptomatic yet tested positive for COVID-19 later became symptomatic. This suggests that the number of asymptomatic carriers who remain asymptomatic would be rather low. Given what we discovered yesterday, I would consider this unsurprising.

If, as this thread ( https://threadreaderapp.com/thread/1248063181223845888.html) surmises, COVID-19 attacks the hemoglobin causing anoxia, you would expect that the number of asymptomatic carriers would be rather low. This is because the immune system would kick into high gear fighting the loss of oxygen.