🦠🧪 When most experts talk about the sensitivity of a test, they forget a key factor: the FREQUENCY with which the test is done.
What is better, to do ONE test with a sensitivity of 90% or TWO tests (for example, on consecutive days) with a sensitivity of 80%?
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What is better, to do ONE test with a sensitivity of 90% or TWO tests (for example, on consecutive days) with a sensitivity of 80%?
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The second option is better.
Let's imagine we have a group of 100 infected people. With the high sensitivity test, we would detect 90 of them.
With the low sensitivity one, we would detect 80 people in the first test on the first day, and on the second day, 80% of those ...
Let's imagine we have a group of 100 infected people. With the high sensitivity test, we would detect 90 of them.
With the low sensitivity one, we would detect 80 people in the first test on the first day, and on the second day, 80% of those ...
...not detected on the first day. That is, in total we would detect 96 people.
Even if the low sensitivity test had a sensitivity of 70%, we would detect more people with TWO tests than with a single test of 90% sensitivity (91 people vs. 90 people).
Even if the low sensitivity test had a sensitivity of 70%, we would detect more people with TWO tests than with a single test of 90% sensitivity (91 people vs. 90 people).
How many antigen tests could be done for the price of ONE PCR?
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