- Home
- Parents Home
- Allergy Center
- Asthma Center
- Cancer Center
- Diabetes Center
- A to Z
- Emotions & Behavior
- First Aid & Safety
- Food Allergy Center
- General Health
- Growth & Development
- Flu Center
- Heart Health
- Helping With Homework
- Infections
- Diseases & Conditions
- Nutrition & Fitness Center
- Play & Learn Center
- School & Family Life
- Pregnancy & Newborn Center
- Q&A
- Recipes
- Sports Medicine Center
- Doctors & Hospitals
- Videos
- Para Padres
- Home
- Kids Home
- Asthma Center for Kids
- Cancer Center for Kids
- Movies & More
- Diabetes Center for Kids
- Getting Help
- Feelings
- Puberty & Growing Up
- Health Problems of Grown-Ups
- Health Problems
- Homework Center
- How the Body Works
- Illnesses & Injuries
- Nutrition & Fitness Center for Kids
- Recipes & Cooking for Kids
- Staying Healthy
- Stay Safe Center
- Relax & Unwind Center
- Q&A for Kids
- The Heart
- Videos for Kids
- Staying Safe
- Kids' Medical Dictionary
- Para Niños
- Home
- Teens Home
- Asthma Center for Teens
- Be Your Best Self
- Cancer Center for Teens
- Diabetes Center for Teens
- Diseases & Conditions (for Teens)
- Drugs & Alcohol
- Expert Answers (Q&A)
- Flu Center for Teens
- Homework Help for Teens
- Infections (for Teens)
- Managing Your Medical Care
- Managing Your Weight
- Nutrition & Fitness Center for Teens
- Recipes for Teens
- Safety & First Aid
- School & Work
- Sexual Health
- Sports Center
- Stress & Coping Center
- Videos for Teens
- Body
- Mind
- Para Adolescentes
Coronavirus (COVID-19): What Are Variants?
As the COVID-19 pandemic evolved, we heard about “variants” of the virus that were different from the original one that started the pandemic. Here are the basics on variants.
What Is a Variant?
When viruses spread, they make copies of themselves. As they do, they often mutate, or change, a little bit. A copy that is different from the original virus is called a variant. Sometimes variants don’t seem that different from the original virus. Others may have clear differences.
The coronavirus that causes COVID-19 has gone through this type of changing process many times during the pandemic. Each time a new coronavirus variant emerges, the World Health Organization (WHO) gives it a name based on a letter from the Greek alphabet. Variants of note include alpha, delta, and omicron.
How Can Variants Differ From the Original Virus?
Variants can differ from the original virus based on:
- how contagious they are
- how sick they make people
- how they respond to vaccines and medicines
- whether people can get infected with the virus more than once
What Can Protect People From These Variants?
In general, the steps that experts have recommended to protect us from the original virus also can work to stop the spread of other variants.
It is still very important to keep doing the things that are in our control, such as:
- getting vaccinated and getting all recommended booster shots
- washing hands well and often
- testing and staying home when necessary
- making sure indoor spaces are well-ventilated
What Else Should I Know?
Scientists are working on a new updated vaccine that can protect against more recent variants. It will likely be ready for use by the fall of 2023.