It depends. You are right that if you can work from home, you definitely should, if infected. But we cannot expect people to be quarantined because of a cold, y

It depends. You are right that if you can work from home, you definitely should, if infected. But we cannot expect people to be quarantined because of a cold, you might have to buy groceries for example. Or travel to a doctor. Or if you have to come to work. In those cases, wear a mask!