Wearing mask discourages you from touching your face with your hands.
If someone sneezes at you, even most simple mask will stop at least 50% of viruses. If someone was far away and only a small load reached you, that may be enough to keep you safe.
> (And if YOU are infected you should not be out anyway)
The big problem is to know when you're infected. Mask keeps others safe if you're not aware that you're infected.
Some reports say that you start distributing viruses pretty much immediately after getting it yourself. Even if all contacts (which is far from guaranteed) get traced and you get checked and/or isolated in a day or two, you'd be already spreading viruses for that timeframe.
If someone sneezes at you, even most simple mask will stop at least 50% of viruses. If someone was far away and only a small load reached you, that may be enough to keep you safe.
> (And if YOU are infected you should not be out anyway)
The big problem is to know when you're infected. Mask keeps others safe if you're not aware that you're infected.
Some reports say that you start distributing viruses pretty much immediately after getting it yourself. Even if all contacts (which is far from guaranteed) get traced and you get checked and/or isolated in a day or two, you'd be already spreading viruses for that timeframe.