3 day wait for COVID Testing is unacceptable
MOST dont quarantine while waiting
In fact asking everyone to quarantine while waiting days is poor public health -> Every 4 negatives is equal to 1 false positive in person-days
2 years in all should have rapid results
1/
MOST dont quarantine while waiting
In fact asking everyone to quarantine while waiting days is poor public health -> Every 4 negatives is equal to 1 false positive in person-days
2 years in all should have rapid results
1/
https://twitter.com/profemilyoster/status/1470730635023163395
We have to be thinking of tests used for public health with population metrics:
If delay is 3 days to get results:
Then for every 2 infectious ppl detected, the wait time alone (6 person days of the person spreading while waiting) is equal to missing 1 full infection
2/
If delay is 3 days to get results:
Then for every 2 infectious ppl detected, the wait time alone (6 person days of the person spreading while waiting) is equal to missing 1 full infection
2/
So the EFFECTIVE SENSITIVITY of a 3 day delayed PCR approaches only 50-60%
You miss ~half of the infectious days - even if you ultimately diagnose nearly everyone. But it is the infectious days averted that is important for public health. Not identifying ppl afterwards
3/
You miss ~half of the infectious days - even if you ultimately diagnose nearly everyone. But it is the infectious days averted that is important for public health. Not identifying ppl afterwards
3/
And if ppl are quarantining while waiting (most don’t) then if wait time is 3 days, then
4 negatives = 12 person days unnecessarily in quarantine = 1 false positive result for every 4 negatives (in terms of unnecessary person-time quarantine)
Unacceptable
4/
4 negatives = 12 person days unnecessarily in quarantine = 1 false positive result for every 4 negatives (in terms of unnecessary person-time quarantine)
Unacceptable
4/
When testing for Public Health
The 3 most important metrics to consider are
SPEED
FREQUENCY
ACCESS
FDA considers none of these 3
Yet these are almost always more important than the molecular sensitivity (specificity matters but can be easily boosted w fast confirmation)
5/
The 3 most important metrics to consider are
SPEED
FREQUENCY
ACCESS
FDA considers none of these 3
Yet these are almost always more important than the molecular sensitivity (specificity matters but can be easily boosted w fast confirmation)
5/
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