Welcome to Chasing Life and the official first day of spring.

You know, for many people, this means there are beautiful blooming flowers, there's warmer weather, great stuff,

but for others, we know it can also be the dreaded start of allergy season.

Here in Atlanta can get bad. In fact, they call it the pollining. Now, if you're

someone who has experienced a major or even minor allergic reaction to pollen or to foods,

it can sometimes be irritating, but it can also be downright dangerous. It's happened to me. It's

happened to my wife. I want to share those stories

today because frankly, they taught me a lot about allergies and I think they might be able to

help you as well. Questions being, what exactly are allergies? Why do we have them? Why does our

body do this? Are they the same as intolerance to things? And how do you

know the difference? My guest today is Dr. Zachary Rubin. He's a pediatric allergist,

clinical immunologist, and he just recently released his book called All About Allergies.

So today, we're chasing down the answers to allergies, from pollen to peanuts, symptoms and myths.

We're going to break it all down.

Connect the dots between the environment, between our exposures, and even our own genetics.

I'm Dr. Sanjay, CNN's chief medical correspondent, and this is Chasing Life.

Project Hail Mary is an awe-inspiring masterpiece.

I'm not an astronaut.

Critics are in agreement.

It's utterly spellbinding.

So, I met an alien.

Mesmerizing and profoundly moving.

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