Dr. Anthony Fauci said that large holiday gatherings are dangerous this year, even if the attendees are fully vaccinated and have received booster shots for COVID-19.

Fauci advised people to avoid gatherings involving more than 30-50 people during the White House COVID-19 task force news briefing on Wednesday.

“Those are the kind of functions — in the context of COVID, and particularly in the context of omicron — that you do not want to go to,” Fauci said in the briefing.

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Fauci called parties and holiday gatherings "high risk," adding that smaller gatherings would be safer for the vaccinated and those who have gotten booster shots.

Guidance by the Centers for Disease Control and Prevention advises that holiday gatherings be avoided altogether if attendees show COVID-19 symptoms or are sick and recommends vaccination as the best way to keep people safe.

"Holiday traditions are important for families and children. There are several ways to enjoy holiday traditions and protect your health. Because many generations tend to gather to celebrate holidays, the best way to minimize COVID-19 risk and keep your family and friends safer is to get vaccinated if you’re eligible," the CDC guidelines read.

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Some 60 million Americans have received booster shots for COVID-19 so far, according to data from the White House. Infections of the omicron variant of the virus are on the rise, but hospitalizations and deaths related to the variant have been considerably lower than previous variants.