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Photo: Francine Orr / Los Angeles Times via Getty Images

People who are fully vaccinated against the coronavirus do not need a booster shot at this time, the Food and Drug Administration and the Centers for Disease Control and Prevention said in a joint statement released Thursday evening.

What they're saying: "People who are fully vaccinated are protected from severe disease and death, including from the variants currently circulating in the country such as Delta," the FDA and CDC said.

  • "Americans who have been fully vaccinated do not need a booster shot at this time. FDA, CDC, and [the National Institutes of Health] are engaged in a science-based, rigorous process to consider whether or when a booster might be necessary," they added.
  • "We continue to review any new data as it becomes available and will keep the public informed. We are prepared for booster doses if and when the science demonstrates that they are needed."

The big picture: The Delta variant is now the dominant version of COVID-19 in the United States, according to the CDC.

  • One dose of the Pfizer-BioNTech or AstraZeneca coronavirus vaccine "barely" protects against the Delta variant of the virus, because of mutations the variant has developed, a new study published in the journal Nature Thursday found.
  • But two doses of those vaccines generated a neutralizing response to the variant in 95% of people, highlighting the importance of full vaccination against COVID-19, Axios' Jacob Knutson writes.
  • Pfizer is expected to seek authorization from the FDA to administer a third dose of the its vaccine after releasing initial results of a study that found that an additional shot was five to 10 times more effective at neutralizing the virus.

Editor's note: This story has been updated throughout.

Go deeper

Jul 8, 2021 - Health

Pfizer to seek FDA authorization for third dose of coronavirus vaccine

A health worker prepares a syringe with the Pfizer/BioNTech ComirnatyCOVID-19 vaccine. Photo: SOPA Images/Getty Images

Pfizer is expected to seek authorization from the Food and Drug Administration to administer a third dose of its coronavirus vaccine to boost immunity and potentially stop the spread of coronavirus variants, according to AP.

Why it matters: Pfizer and BioNTech released the initial results of a study on coronavirus booster shots, finding that a third dose was five to 10 times more effective at neutralizing the virus than two doses.

Jul 8, 2021 - Health

Study: Delta coronavirus variant evades antibodies through mutations

An EMT administering a dose of coronavirus vaccine to a student in Winnetka, Calif., on July 6. Photo: Mario Tama/Getty Images

One dose of the Pfizer or AstraZeneca coronavirus vaccine "barely" protects against the Delta variant of the virus, because of mutations the variant has developed, according to a new study published in the journal Nature Thursday.

Why it matters: The study found that two doses of those vaccines generated a neutralizing response to the variant in 95% of people, highlighting the importance of full vaccination against COVID-19.

Updated Jul 8, 2021 - Health

Olympics to be held without spectators as Tokyo enters state of emergency

Japan's Prime Minister Yoshihide Suga speaking to reporters in Tokyo on Wednesday. Photo: STR/Jiji Press/AFP via Getty Images

Summer Olympics events in the Tokyo area will be held without spectators, after Japan declared a state of emergency in the capital following a surge in COVID-19 cases, Japan's Olympics minister announced Thursday.

Why it matters: It's another huge blow to the spectacle and finances of the delayed and scaled-back Olympics, just two weeks ahead of the opening ceremony.