As reported in a much earlier post,
combining a
temperature check
with a “sniff test”
doubles the chance of spotting a Covid-19 infected person.

By “sniff test” they mean asking someone to sniff the odor coming from substance they cannot see, and correctly identifying it.

Peanut butter, mustard, strawberry jam, etc
can serve as the unknown odor to be identified.

About 30% will show a fever,
another 30% will have a loss of smell,
some will have both however.

Adding the check:
is there a “dry cough”
is another thing that should be a warning sign.

None of the 3 above tests approaches the accuracy of a 10 minute Saliva Test for Covid-19.

The Saliva test is less accurate than the Nasal Swab test that takes a long time.