Dr. Seheult: The CDC has just come out now with updated information about what to do in terms of ventilation. So the key in preventing yourself from getting COVID-19 is to make sure that.

You know, you're not getting it from somebody directly from like large sputum, or droplets.

So you want to make sure that you're wearing a mask, that they're wearing a mask, that you're distanced. But also realize that if you're in a room that's stagnant, wearing a mask is not going to be 100% effective because it's kind of like smoking, right? If somebody is smoking on the other side of the room, you may not smell it. But if you're in there for long enough, that smoke is going to fill up the room. And so what's really important is ventilation. Now, you know, that may be difficult to do in the wintertime when it's cold outside, but as much as possible, even just cracking the window a few inches, if you can do it, and maybe dressing more warmly, having ventilation in closed spaces can really do a lot.

So it's all of the above. It's the mask-wearing, it's the distancing, it's to make sure that you're not in an enclosed space for a long period of time with other people. You know, interestingly, you might wonder why people don't get the virus when they're on a plane. That's a closed space and people are wearing masks. Well, you may not know this, but they do air changes, like tenfold, every hour, and all of that air is going through HEPA filters, and so the virus gets trapped. And that's why it works as people are on planes for five, six hours, you know, going across the continent, they're wearing masks, but they're not getting COVID-19. You might find a few examples where people might get it. But generally speaking, it's very successful. And why is that? It's because of ventilation.