[1] Viable virus checked in 3790 positive samples with known CT values. (indicating they were infectious)

Virus could be cultured in
70% samples with CT values ≤ 25.
3% samples with CT values > 35.

"It& #39;s fair to say that a person with a higher viral load is more infectious"
[2] Weill Cornell Medicine study: (June 2020)

Number of deaths among 678 hospitalized patients, and their CT values:

35% patient deaths had a CT value ≤ 25 ,
17.6% had a CT value of 25- 30
6.2% had a CT value > 30.
[3] Brazil study: (August 2020)

Among 875 patients, those with a CT value ≤25 were more likely to have severe disease or die.

Conclusions:

[1] Knowing whether CT values are high or low can be highly informative.
“Even with all the imperfections, knowing the viral load can be extremely powerful” ~ @michaelmina_lab

[2] CT values could help doctors flag patients at high risk for serious disease.

[3] CT values could help determine who is infectious/ to isolate them/ track contacts.
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