In my neighborhood here in Seoul, there was a confirmed case. I had the emergency alert.

There was a confirmed case. They went to your local supermarket on this date between these

hours.

That's Paula Hancock's CNN's International Correspondent based in South Korea. One

day she got a text message from the government providing her information about a confirmed

COVID case near her.

And when I went to the supermarket late and they explained that this individual had used

a self-checkout counter and told me which one. It even told me that this individual

had bought dried chilies.

What Paula is describing may sound like something out of science fiction. But that's what South

Korea is doing to fight the pandemic right now. And so far, it's working.

As the United States begins to open up, experts have said that rigorous contact tracing is

an important part of the safe way forward. Could what we see in South Korea be our future

as well? And how much surveillance is too much? I'm Dr. Sanjay Gupta, CNN's Chief Medical

Correspondent. And this is coronavirus, fact versus fiction.

The COVID-19 pandemic is changing our lives in so many ways. And what's going to happen

in the future is still unclear. Are we going to have to download apps? Will those under

quarantine have to wear wristbands? Will we be scanned for fevers every time we step into

an office or a restaurant? I've been hearing all sorts of questions like these. So I wanted

to speak with Jennifer Nuzzo. She's an epidemiologist at the Johns Hopkins Center for Health

Security. I wanted to know what role technology might play in our fight against this pandemic.

Could we soon be using these contact tracing apps here in the United States?

...