The Omicron Variant

Recently, a new variant of the COVID-19 virus has surfaced. “Variants” or “strains” are types of COVID-19 viruses that have mutated, or changed, from their original form. This naturally happens as a virus spreads; for example, each flu season there may be a variant and each new flu vaccine is designed to protect against it.  When a variant infects a large number of people, it can become a “dominant strain” because it is the most successful at spreading person-to-person.

As of this week, the Omicron variant has been detected in the United States. The Delta variant is still the dominant strain in the United States.

What We Know

So far, scientists know that the Omicron variant seems to have more mutations from the original virus in the past, including the Delta variant. It also may be more transmissible from person-to-person, however there is not enough data to know for sure. Symptoms of the Omicron variant do not seem to be different from other forms of COVID-19. To read about possible COVID-19 symptoms, click here.

From data in countries with more confirmed cases, previous infection with COVID-19 does not provide immunity against the Omicron variant. This means that the virus has changed enough from its original form that it evades natural immunity. Although this is disappointing, similar changes happen with other viruses. It is also expected to have spikes in virus transmission rates as it gets colder and more people travel for the holidays. Finally, we have learned a lot from the Delta variant; measures like vaccinations and boosters, masking, and social distancing provide great protection against COVID-19.

Vaccines and Omicron

Vaccines provide two types of immunity against COVID-19. First, your body makes antibodies against parts of the virus to recognize and fight it. Second, your immune cells remember the virus so it can protect you in the future.

Because the Omicron variant has changed from the original COVID-19 virus, antibody immunity may not be as strong. However, more importantly, immune cell defenses can still protect people who are vaccinated against severe disease. It is a great idea to get vaccinated or receive a booster shot to prevent COVID-19.

How to Protect Yourself and Your Loved Ones

We have learned a lot over the course of the pandemic about how to prevent the spread of COVID-19. The best way to prevent illness and death from all forms of COVID-19 is to get a vaccine, and get a booster shot if you are eligible. Encourage your family members to stay up to date with their vaccines. Continue to wear a mask indoors in public places and consider COVID-19 testing before large holiday gatherings. Practice good hand hygiene and keep your spirits high. For more tips about Staying Safe During the Holidays, visit our What’s New Page and the CDC’s guide on Travel and COVID-19. To read more about Omicron, visit this helpful article from UCLA Health with FAQs and answers.