Today I'm bringing back Aaron Brohmich. He's a CNN contributor and biology professor at

the University of Massachusetts Dartmouth. He's been on the podcast before to talk about

how to fly safely. So general recommendations for food and snacks if you're on a short

whole flight is just bring your own. And having summer fun.

We maintained pool water will not be a source of spread of the virus. The chlorine that's

in it will inactivate virus fairly quickly.

But providing helpful tips isn't all Aaron does. As a scientist he researchers the evolution

of the immune system and is paying close attention to how ours are responding to COVID-19.

I'm going to hand this episode over to him to talk about the ways our bodies are developing

or not developing protections against this virus. I'm Dr. Sanjay Gupta, CNN's chief medical

correspondent. And this is coronavirus, back versus fiction.

My most recent column for CNN is sort of an immune system 101. For the last 25 years

I have been studying how our immune system responds to viral infections. I can tell you that

understanding this is really complex and does not come quickly and it does take a lifetime

of study. So by now many of us have seen an image or representation of the coronavirus.

It's that tiny round ball that has these little spikes, these little protrusions all over

the surface of it. That's fairly easy to visualize. But what's harder to visualize is what

is actually happening inside our body to defend herself against that virus once it gets in.

When a pathogen enters the body we are hardwired to mobilize a series of cells and proteins

to fight it off. If faced with a low dose of virus our bodies might be able to neutralize

it before we even realize that we were exposed.

The downside is that our immune system actually learns from having a long hard fought war

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