Israeli-designed instant coronavirus breathalyser could be rolled out globally(jewishnews.timesofisrael.com)
jewishnews.timesofisrael.com
Israeli-designed instant coronavirus breathalyser could be rolled out globally
https://jewishnews.timesofisrael.com/israeli-designed-instant-coronavirus-breathalyser-could-be-rolled-out-globally/
Having some false negatives is OK. Too many false positives is not so good, because then you are isolating people who don't have any disease.
Vaccines can have bad side-effects, especially if you try to develop them in a hurry. The same with medicines.
Anything you have to put inside your body has the potential to cause a problem worse than the disease.