Just wanted to also add, since it's kind of relevant to this thread: the CDC just published a study a few days ago that shows that even in fully vaccinated people, if they do contract the delta variant, they will spread the virus just as well as a non-vaccinated individual. Of course the probability to contract it in the first place is smaller, but if it happens, the symptoms have changed enough, especially if you're also vaccinated, that you might think that it's just a cold and will spread it around.