Listener Questions Answered: Dr. Sanjay Gupta's podcast for May 19

(CNN)CNN Chief Medical Correspondent Dr. Sanjay Gupta goes through his inbox and answers some listeners' questions about Covid-19.

You can listen on your favorite podcast app or read the transcript below.
Dr. Sanjay Gupta: It seems like the longer this pandemic goes on, the more questions we have. From the near future to the long haul, we all want to know how and when things will go back to normal.
    I'll be honest — as a doctor, I hate not having all the answers. But it's important to me to keep reassessing, checking in and updating you as things change.
      So today I'll address some of the questions you've been sending me.
      I'm Dr. Sanjay Gupta, CNN's chief medical correspondent. And this is "Coronavirus: Fact vs. Fiction."
      Laura: I work for FedEx as a courier. We've been hearing things about there being home test kits for coronavirus and that they would be shipping them through us.
        And I was just curious, what are your thoughts on this? Should the couriers be concerned about this?
        Gupta: Well first off, thanks so much for your service. It's so important that essential workers like you not be put at risk.
        The Food and Drug Administration approved the first at-home Covid-19 test earlier this month — and I've actually done it. It involves spitting into a test tube.
        You've got to fill the vial up to a certain line — usually takes several minutes — you seal it in a biohazard bag and send it back to a lab.
        I can see how it would be scary to transport a package that might contain the coronavirus, especially since a study published in March reported that the coronavirus can live on cardboard for up to 24 hours.
        But the truth is, you just need to do the same things that everyone should be doing when they're in public, possibly coming into contact with people.
        The CDC [US Centers for Disease Control and Prevention] suggests wearing a mask, keeping cleaning supplies in your vehicle, disinfecting surfaces often, frequent handwashing and avoid touching your face.
        And for people who are sending or receiving packages, also remember to wash your hands after getting a package and staying 6 feet away from your delivery driver, or just having them leave things on the porch.
        But I want to say again to all the frontline workers out there, it's people like you who are making sure that these things are even possible. That testing is as widely available as possible. And that is absolutely crucial to turning the corner on this pandemic.
        Mustafa: In some parts of the world, mosquitoes could transmit some viruses such as malaria. My question is, could mosquitos transmit as well coronavirus?
        Gupta: According to the World Health Organization, there is no evidence to suggest that this novel coronavirus could be transmitted by mosquitoes.
        From what we know about coronaviruses, like SARS and MERS, which is the Middle East respiratory syndrome, as well as this one, too, they are respiratory viruses. They are