A local (Pittsburgh) talk show host had an expert from NYC on the phone yesterday, talking about appropriate precautions.
He had several interesting opinions some of which were a little irritating to the host, but whatever. He seemed to be more focused on air circulation than masks. He thoughts masks were rather superfluous when outside; "Just keep your distance and don't worry about wearing a mask." OTOH, when INSIDE, he thought not only is a mask a good idea (due to lack of good ventilation in most public gathering places), but the masks most people are using are nearly worthless. He pointed out that when doctors are in a vulnerable situation, the masks they wear actually have adhesive around the edges so that NO AIR CAN GET AROUND the mask. Otherwise, it almost not worth bothering with. As a minimum, we should wear masks that are reasonably tight and wear them religiously in any crowded circumstance.
His opinion, I gather, would be that wearing masks when outside for three months would be not only irritating but pointless.