All New: With a shortage of vaccines, we examine if delaying the second dose is the way to increase supply and save lives. Or is there a risk of making it less effective? Plus, the Oz-approved drive-thru and takeout meals that won't derail your diet on our System 21 plan.

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Do You Really Need a Booster Vaccine? Here's All You Need to Know

Learn how to continue living while stopping the spread.

We're not where we were last year. COVID-19 continues to spread and mutate, so now we have to figure out how to continuing living while stopping the spread. So here's everything you need to know about how the booster vaccine works, why your body needs it, and who needs it most. Plus, what do you do about the booster if you already had COVID-19? Hear from Drs. Jen Caudle, Peter Hotez and Ashish Jha to get answers to your biggest questions.