Yes, it's a reasonable point that truly effective masks do exist. I'd be very surprised if most individuals were prepared to wear them in all situations where i

Yes, it's a reasonable point that truly effective masks do exist. I'd be very surprised if most individuals were prepared to wear them in all situations where infections could occur though. A lot of transmission is household transmission - would many people be willing to wear a fitted n95 mask or equivalent as a precaution when visiting friends or family - potentially indefinitely?