The Centers for Disease Control and Prevention is now recommending that people get a booster shot five months after being vaccinated with the Pfizer-BioNTech COVID-19 vaccine.

“Today, CDC is updating our recommendation for when many people can receive a booster shot, shortening the interval from 6 months to 5 months for people who received the Pfizer-BioNTech COVID-19 Vaccine,” the agency said in press release. “This means that people can now receive an mRNA booster shot 5 months after completing their Pfizer-BioNTech primary series. The booster interval recommendation for people who received the J&J vaccine (2 months) or the Moderna vaccine (6 months), has not changed.”

The CDC also announced on Tuesday that it “is recommending that moderately or severely immunocompromised 5–11-year-olds receive an additional primary dose of vaccine 28 days after their second shot.”