Sanjay Gupta

So just think about that.

Someone starts to get sick, and then they have to sort of think about what they were doing two months earlier, what the exposures may have been.

This long interval makes tracking down people who may have been exposed particularly difficult.

But that's the incubation period.

The good news again is that the infectious period, the window for transmission, appears to be pretty short, about a day or so.

We know a lot about this Andes virus due to an outbreak that occurred in 2018.

It's kind of an incredible story.

A man walks into a birthday party.

He is sick at the time.

He has fever.

He is symptomatic.

He spreads the Andes virus to five people and then some of them spread it to others and so on and so on.

And at the end of this super spreader event, 11 people have died and 34 people were infected.

That gives you some idea of the real-world transmission of this virus.

But importantly, there were 80 healthcare workers that took care of those patients, and none of them got sick.

None of them tested positive.

Very, very important.

I think it sort of makes two points.

First of all,

Just with simple protective measures like masks, people were able to avoid getting infected, even though they were caring for patients who were clearly sick.