Vaccines are substances that prevent or lessen diseases by teaching your body's immune system how to defend against them. There are a wide variety of vaccines available that protect against serious or possibly fatal infections. You'll receive vaccinations from birth, through your 20s, 30s, 40s, and beyond to help your body stay healthy.

Flu Vaccine Basics

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Where To Get a Free Flu Shot—With or Without Insurance
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Flu Shots: Are They 'Live Virus' Vaccines or Not?
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When to Get a Flu Shot This Year, According to Doctors

COVID-19 Vaccine Information

What Happens before, during, after COVID-19 vaccine , Woman with adhesive bandage on her shoulder - injury concept
Getting the COVID-19 Vaccine: What to Expect Before, During, and After Your Appointment
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What To Know About 'COVID Arm'
Your COVID-19 Vaccine Card, What to Do if You Lose It, Why You Shouldn't Laminate It, and Other Important Info , BOSTON - DECEMBER 16: Elizabeth Hafted, Pharmacist displays a COVID-19 Vaccination Record Card at Beth Israel Deaconess Medical Center in Boston on Dec. 16, 2020. (Photo by Jessica Rinaldi/The Boston Globe via Getty Images)
What To Know About Your COVID-19 Vaccine Card
What Are the Differences Between the Pfizer and Moderna COVID-19 Vaccines?
FDA and CDC WIll Pause Use of Johnson & Johnson Vaccine Over Blood Clot Concerns
The Johnson & Johnson Vaccine and Blood Clots

Explore Vaccines

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New Omicron Booster Side Effects: What to Expect From the Bivalent Vaccines
Doctor cleans a smiling woman's arm before giving her a shot
You May Be Better Protected if You Space Out Your COVID and Flu Shots—Here's Why
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Annual COVID Vaccine: U.S. Tries 'New Approach' With Omicron Boosters
A man waits in line to recieve the Monkeypox vaccine before the opening of a new mass vaccination site at the Bushwick Education Campus in Brooklyn on July 17, 2022, in New York City. - New York, on the US East Coast, has already either administered or scheduled 21,500 vaccines and hopes to speed up the process, promising more than 30,000 jabs for the whole state. (Photo by Kena Betancur / AFP) (Photo by KENA BETANCUR/AFP via Getty Images)
There Are More Monkeypox Vaccines—But Immunocompromised People May Still Be at Risk
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What Is Trypanophobia? How to Cope With a Fear of Needles So You Can Get the COVID-19 Vaccine
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Why It's Tough to Directly Compare the J&J Vaccine Blood Clots to Those Linked to Birth Control
Pfizer Booster
FDA Authorizes Pfizer Booster Shots—Here's Who Can Get One
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28-Year-Old Who Wasn't Vaccinated Because She Feared the Shot Would Affect Her Breastfeeding Son Dies of COVID
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The COVID-19 Vaccine May Change Your Menstrual Cycle—Here's What to Know
Concentrated woman doctor vaccinating a young woman
Study: mRNA Vaccines Fare Better Against COVID Variants
The 8 Best COVID-19 Face Masks of 2022
The 8 Best COVID-19 Face Masks of 2023
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How Concerned Should You Be About Getting Thrombocytopenia After a COVID-19 Vaccine?
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COVID-19 Vaccine Shedding—Why Vaccine Shedding Won't Happen
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What Happens if You Miss Your 2nd COVID-19 Shot?
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Are You Protected If Your COVID-19 Vaccine Didn't Cause Side Effects?
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Can You Drink Alcohol After Getting the COVID-19 Vaccine?
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Can You Exercise After Getting the COVID-19 Vaccine?
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Fetal Cell Lines Were Used to Make the Johnson & Johnson COVID Vaccine—Here’s What That Means
Lip Swelling After the COVID-19 Vaccine—Here's What To Know
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When To Get Boosted After Having a COVID-19 Breakthrough Infection
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Will Everyone Need a Fourth Dose of a COVID-19 Vaccine?
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Are There Medical Exemptions From the COVID-19 Vaccine?
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COVID-19 Vaccines for Kids 12 to 15: Your Biggest Fears Addressed by Experts
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Why Does Everyone React Differently to the COVID-19 Vaccines?
natural immunity vs vaccine
Does Natural Immunity Protect Against the SARS-CoV-2 Variants, or Do I Still Need the Vaccine?
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Side Effects From the COVID-19 Booster Shot
Why Do Providers Say to Drink Water Before/After COVID shot?
How Helpful Is Being Hydrated Before You Get a COVID-19 Vaccine or Booster Shot?
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Moderna Is Developing 2 New Vaccines—And 1 Could Protect Against the Common Cold
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What We Know About COVID-19 Vaccines for People Who Are Immunocompromised
is the COVID-19 Vaccine Safe for everyone?
Is the COVID-19 Vaccine Safe for Everyone? Here's Who Should (and Shouldn't) Get It
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With Omicron Variant Infections Rising, Should You Change Your Holiday Plans? Here's What Experts Say
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Is It Safe to Go to an Outdoor Concert? Here's What Experts Say About Your COVID Risk
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Can You Go on a Cruise Without Being Vaccinated for COVID-19?
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CDC and WHO Warn of Measles Outbreak Risk After 22 Million Babies Missed Their Vaccines During Pandemic
Squamous epithelial cells of human cervix under the microscope view. Pap smear test is a procedure to test for cervical cancer in women
Can Adults Get the HPV Vaccine?
flu shot effectiveness
How Effective Is the Flu Shot? What Doctors Are Saying About This Year's Vaccines
Dad of 5 Dies From COVID , Patient attached to respirator at beginning of operation Surgeon and nurses standing next to bed
Unvaccinated Parents Die From COVID-19 Two Weeks Apart Illustrates the Risks
FDA Mix-and-match vaccine boosters
FDA to Allow 'Mix and Match' COVID Boosters, But Which One Should You Get?
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The US Is Getting Ready to Start Vaccinating Kids Ages 5–11 Against COVID-19—Here's How
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FDA Panel Recommends Johnson & Johnson Booster Shot—Here's What Happens Next
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Ohio Woman Got to Feel the Baby She Delivered in an Emergency C-Section Before Dying of COVID
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Samantha Wendell, 29, Died of COVID After Postponing the Vaccine Because 'She Was Worried About Her Fertility'
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Booster Recommendations After J&J's Janssen COVID-19 Vaccine
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Idaho Nurse Dies of COVID—And Her Family Blames 'Misinformation' for Convincing Her Not to Get Vaccinated
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President Biden Announced a New Vaccine Mandate—But What Is a Mandate, and What Happens if You Don't Comply?
CDC Travel Advisory Over Labor Day: Should You Travel? One mature woman is standing on the air-stair of her plane with her boarding pass and has turned round to give one last look to her home before she goes travelling.
CDC Issues a Labor Day Weekend Travel Advisory Asking Unvaccinated People to Stay Home—Here's What to Know
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What to Say to People Who Still Want to 'Wait and See' Before Getting the COVID-19 Vaccine
FDA Approves the Pfizer Vaccine, Now Called Comirnaty—Here's What FDA Approval Means
FDA Approves the Pfizer Vaccine, Now Called Comirnaty—Here's What FDA Approval Means
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If You're Up to Date on COVID-19 Vaccinations, You Do Not Need to Quarantine After Exposure to the Virus
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Can I Get a Pfizer Booster If I Had Moderna or J&J?—Here's What We Know About Mixing COVID Vaccines
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8 Scenarios To Delay Vaccines for Kids
moderna covid 19 vaccine booster shots , Top view of bunch of sterile syringes with vaccine arranged on pink background. Set of syringes with medication
FDA Panel Approves Moderna COVID-19 Booster—Here's What That Means and What Happens Next
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CDC Releases New Mask Guidelines—Here's When and Where You Can Go Without One
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COVID Vaccine Rates Are Down—Here’s How PEOPLE’s New Initiative With CVS Health and Walmart Might Help
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The FDA Just Authorized Johnson & Johnson’s Single-Shot Vaccine for Emergency Use—Here’s How it Stacks Up
Group of vaccines for Covid 19 virus in a block of ice for preservation and transport.
Why Does the COVID-19 Vaccine Have to Be Kept So Cold?
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What Is a COVID Variant and How Concerned Should You Be?
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7 Breakthrough COVID Cases Have Hit the New York Yankees—What Does This Term Mean?
Man dies of covid before vax appt
A 25-Year-Old Died of COVID-19 Two Days Before His Vaccine Appointment
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What Is in the Flu Shot? Here's How Experts Explain Common Ingredients
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Before Dying of COVID-19, TikTok Star Urged Others To Get Vaccinated
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How the COVID-19 Vaccines Were Made So Quickly