Headlines are appearing about a new version of the COVID-19 virus—a new type of the Omicron variant called a subvariant. The original Omicron variant is the one that that caused cases to spike in December and January. It’s too early to tell whether the new subvariant will produce another surge, but a Mount Sinai expert urges you to keep an eye on the situation and pay attention to public health advice.
Public health officials are closely monitoring this subvariant of the Omicron variant, which is called BA.2 and has been cited in reports of increasing infections in Europe. A subvariant means this virus has variations from the first Omicron variant that came through New York City, called BA.1.
“We can never really predict whether what’s happening in Europe will happen to us as well, so the best thing to do is to remain vigilant,” says Bernard Camins, MD, Medical Director for Infection Prevention at the Mount Sinai Health System, who has been tracking COVID-19 since the first cases were identified in New York in March 2020.
The new subvariant, BA.2, is more contagious than the other Omicron subvariant BA.1 and is replacing the latter among the region’s population, according to Dr. Camins. But what’s most important to know is that existing vaccines still work against this new subvariant of Omicron to limit serious illness and hospitalizations. Antiviral medications are also effective and are now widely available.
Dr. Camins says you should continue to look to public health authorities such as the Centers for Disease Control and Prevention (CDC) and local public health agencies for official guidance on the Omicron subvariant and keep following any existing safety precautions that may apply to you.
For example, while new COVID-19 cases in New York City are rising slightly, they are still at low levels, so the current CDC guidelines for the region have no recommendations for masking in public. Dr. Camins advises that you should be sure to get vaccinated and boosted, and be aware that some people with weakened immune systems are at increased risk of infection so they may feel safer if they prefer to keep wearing masks.
The BA.2 news has prompted some to wonder about getting a fourth dose of the vaccine. On March 29, the U.S. Food and Drug Administration (FDA) authorized a second booster dose of either the Pfizer-BioNTech or the Moderna COVID-19 vaccines for older people and certain immunocompromised individuals. A vaccine has not been authorized for kids under five.