Disease Detectives: Dr. Sanjay Gupta's coronavirus podcast for June 11

(CNN)Across the country, local officials are hiring people to track down anyone who may have been exposed to Covid-19. CNN Chief Medical Correspondent Dr. Sanjay Gupta talks to Dr. Syra Madad, an epidemiologist and special pathogens expert, about the importance and process of contact tracing.

You can listen on your favorite podcast app, or read the transcript below.
Lisa Abramson, contact tracer: A lot of my family members and friends had been affected by this terrible disease. And I really wanted to help out in some major way.
    Dr. Sanjay Gupta: That's Lisa Abramson, a contact tracer in New York City. She's one of the disease detectives now charged with tracking down anyone who may have interacted with a person infected with the coronavirus.
      To help stop the spread, Abramson reaches out by phone to people who have recently been diagnosed with Covid-19.
        Abramson: You ask some of the questions, you know, have you contacted anyone or have you had sex with anyone? We often ask them to, you know, if you can pull out your cell phone and look at your calendar to see where you were around that time so that we can get the accurate information.
        Gupta: Contact tracers in the United States rely on people trusting them enough to give honest information to those kinds of questions.
          So it can be a very difficult job.
          There's no one federal agency overseeing the contact tracing efforts, so exactly how it works varies from the state to the local level.
          And even though contact tracing has been used to contain a variety of diseases over the decades — from smallpox to HIV — it's never been done in the United States at the scale now required to tackle Covid-19.
          So are we up to the task?
          I'm Dr. Sanjay Gupta, CNN's chief medical correspondent. And this is "Coronavirus: Fact vs. Fiction."
          Syra Madad is the senior director of the special pathogens program office at New York City Health and Hospitals. She was featured in the Netflix series "Pandemic," which remarkably was released this past January — a month before news of Covid-19 became well known in the United States.
          Madad has been instrumental in guiding the largest public health care system in the country through this outbreak. She's now helping train what she hopes will become an army of contact tracers in New York City.
          Dr. Syra Madad, senior director, system-wide special pathogens program, New York City Health and Hospitals: We've never done this before. It's obviously taking an army of people to be able to, you know, strategize and then move forward with this current strategy, that is a core public health tenet.
          You know, public health has been doing this for, for decades. You know, obviously for foodborne illnesses, for infectious diseases, sexually transmitted diseases, so this is not something new.
          If you — even if you look at smallpox, you know, it was eradicated in 1980 not because of immunizations, but because of really rigorous contact tracing.
          So it works, but it has never been used to this type of magnitude.
          Gupta: A lot of people are becoming familiar with this term "contact tracing" over the last few months. But can you break it down?
          Can you just give an example of what it might look like if someone is tested and their results come back positive? What happens in a situation like that?
          Madad: When you get that call, they're gonna ask you, "Basically two days before you were diagnosed with Covid-19, tell us where you've gone to and who you've come in contact with." So you want to figure out who those close contacts are and then follow up with them and, you know, and see have they been exposed and then provide them various counseling resources.
          And I think one thing that's very unique here in New York City is actually providing them wraparound services. So letting them know that, you know, if you need to get food, if you need to get anything, we'll help set that up. So that way you don't have to leave your home because, again, as soon as you leave your home, then you're risking, you know, transmitting the disease to other people.
          The other thing is if you can't stay in your home, for those types of scenarios, we have isolation hotels in New York City. So if you can't safely isolate at your home, then they're going to put you up voluntarily, if you want to, in an isolation hotel or a quarantine hotel where you're going to get food and all those various services and health checks for whatever period of time that you're infectious.
          Gupta: If I did get a call from a contact tracer that said there was a concern because I'd come in contact with somebody who was now suspicious for having Covid, would I be told who that person was? Is that important?
          Madad: No. So you wouldn't be told who, who that particular individual is. They will let you know that you've been exposed to somebody that has, you know, confirmed Covid-19 or, you know, high likelihood of having Covid-19. So they would not provide any information on the actual index case.
          Gupta: Who are becoming contact tracers? Can anyone apply to do this?
          Madad: So anyone can apply. But you want to make sure they have some sort of a science or medical background — that's certainly preferred. But I think it's also important to note that when people, when people think of contact tracers, they think of people just over the phone. And that's actually not just the case.
          There's actually multiple layers to contact tracing. So you have an individual that's making the calls. Then you have other individuals that are monitoring. So those people that are being quarantined for 14 days, you're gonna get a call, presumably every day, depending on what state you're in, to say, "Hey, are you OK? What are your signs of symptoms?" So you have other people doing that.
          But then you have individuals that some people don't have phones. Some people you can't reach by phone for whatever reason, so you have a different workforce that are still contact tracers but they're going to go out in the field.
          So if they can't reach you x number of times, then they're going to deploy somebody to go out to your home, and they're going to knock on your door and going to say, you know, "Sir, ma'am, you know, you've potentially been exposed to somebody that has Covid-19. We've been trying to reach you."
          And so you want to make sure you're providing information, whether it's going to their homes, slipping the letter underneath their door, trying to get in contact with them as much as possible.
          Gupta: That's, that's fascinating. Can you walk us through the training process a bit?
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