A test for Covid-19
Take a clean glass and pour a measure of your favourite tipple.
See if you can smell it. If so you are half-way there.
Drink it to and if you can taste then it is reasonable to assume you are currently Covid free.
I tested myself 7 times and was Covid free each time. Praise God.
But i will have to test myself again this morning as I have a headache, which can also be one of the symptoms.