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Illustration: Sarah Grillo/Axios

Over 5 million Americans have missed their second shots of the mRNA vaccines by Pfizer or Moderna, the New York Times reports, citing data from the Centers for Disease Control and Prevention.

Why it matters: Vaccine effectiveness of partial immunization from Pfizer or Moderna — more than 14 days after the first dose, but before the second dose — was 80% in a recent CDC study of health care workers.

  • But receiving just one shot "triggers a weaker immune response and may leave recipients more susceptible to dangerous virus variants," the Times notes.

The big picture: 28% of Americans are fully vaccinated, according to the latest tally from the CDC, and roughly 42% have received at least one vaccine dose.

  • Approximately 92% of people have followed through on getting their second shot, which is still strong by historical standards, per the Times.

Go deeper

8 mins ago - World

Israel's "change bloc" collapses, leaving Netanyahu in charge

Bennett (L) with Netanyahu in 2015. Photo: Gali Tibbon/AFP via Getty Images

In a dramatic shift that comes amid fighting in the Gaza strip and clashes between Jewish and Arab citizens in Israel, right-wing kingmaker Naftali Bennett has announced he will no longer seek an alternative government to oust Prime Minister Benjamin Netanyahu.

Why it matters: Bennett had been on the verge of a power-sharing deal with centrist opposition leader Yair Lapid that would have made him prime minister for two years until Lapid rotated into the job. Without Bennett, Lapid has no path to a majority, and Israel will almost certainly head for its fifth election since 2019 with Netanyahu still in his post.

CDC says fully vaccinated people don't have to wear masks indoors

CDC Director Rochelle Walensky. Photo: Erin Clark-Pool/Getty Images

The CDC announced in new guidance Thursday that anyone who is fully vaccinated can participate in indoor and outdoor activities without wearing a mask or physically distancing, regardless of crowd size.

What they're saying: "If you are fully vaccinated, you are protected, and you can start doing the things that you stopped doing because of the pandemic," CDC Director Rochelle Walensky will say at a White House press briefing.