Video
Shop
Culture
Family
Wellness
Food
Living
Style

Travel
News
Book Club

Newsletter

Privacy Policy
Your US State Privacy Rights
Children's Online Privacy Policy
Interest-Based Ads
Terms of Use
Do Not Sell My Info
Contact Us
© 2026 ABC News

VIDEO: How do we determine how long COVID-19 vaccine protection lasts?

2:10

gma3
March 22, 2021

How do we determine how long COVID-19 vaccine protection lasts?

Dr. Jen Ashton answers viewers’ questions about the vaccines.

Up Next in news

US study of AstraZeneca vaccine proves efficacy

US study of AstraZeneca vaccine proves efficacy

VIDEO: Fallout after Fed nominee grilled on Capitol Hill

Fallout after Fed nominee grilled on Capitol Hill

VIDEO: American influencer found dead in Tanzania

American influencer found dead in Tanzania

The latest lifestyle and entertainment news and inspiration for how to live your best life - all from Good Morning America.

Contests
Terms of Use
Privacy Policy
Do Not Sell My Info
Children’s Online Privacy Policy
Advertise with us

Your US State Privacy Rights
Interest-Based Ads
About Nielsen Measurement
Press
Feedback

Shop FAQs
ABC News
ABC
All Videos
All Topics

Sitemap

© 2026 ABC News

Privacy Policy—
Your US State Privacy Rights—
Children's Online Privacy Policy—
Interest-Based Ads—
Terms of Use—
Do Not Sell My Info—
Contact Us—

© 2026 ABC News