Scientific Understanding of BA.2.86 as of August 23, 2023
If you choose to wear a mask, wear a high-quality one that fits well over your nose and mouth. Seek treatment if you have COVID-19 and are at high risk of getting very sick. Get your COVID-19 vaccines, as recommended. That means you can still take the following actions to protect yourself and others from infection: What can you do to protect yourself and others as we learn more?Īt this time, we don’t know how well this variant spreads, but we know that it spreads in the same way as other variants. If licensed/authorized by the FDA and recommended by the CDC, updated vaccines will be available as early as mid-September at your local pharmacy or doctor’s office. That assessment may change as additional scientific data are developed. At this point, there is no evidence that this variant is causing more severe illness. CDC’s current assessment is that this updated vaccine will be effective at reducing severe disease and hospitalization. Scientists are evaluating the effectiveness of the forthcoming, updated COVID-19 vaccine. BA.2.86 may be more capable of causing infection in people who have previously had COVID-19 or who have received COVID-19 vaccines. Current Risk Assessmentīased on what CDC knows now, existing tests used to detect and medications used to treat COVID-19 appear to be effective with this variant. This variant is notable because it has multiple genetic differences from previous versions of SARS-CoV-2. 
At least two cases have been identified in the United States. Last week, a new variant of SARS-CoV-2 called BA.2.86 was detected in samples from people in Denmark and Israel. These viruses with changes are called “variants.” These changes can affect how contagious a virus is, how well it responds to treatment, and how severely it affects people. All viruses, including the virus that causes COVID-19 (SARS-CoV-2), change over time.
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