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The nation’s top public health official on Thursday endorsed recommendations from expert advisers for mixing and matching of coronavirus vaccines for booster shots as they unanimously recommended additional doses of Moderna and Johnson & Johnson’s shots for tens of millions of Americans.

The panel specifically backed those companies’ boosters for people deemed vulnerable because of their age, health or occupation. It said that consumers should be allowed to choose from any of the three boosters now authorized in the United States, no matter which vaccine they first received.

Members directed the Centers for Disease Control and Prevention to provide further guidance about which groups might benefit from choosing one booster over another, noting the risks and benefits vary based on age and sex, among other factors.

Here’s what to know

  • An estimated 115,500 health-care workers have died of covid-19 around the world, according to a working paper by the World Health Organization.
  • Florida Gov. Ron DeSantis (R) plans to convene a special session of the state legislature to combat coronavirus vaccination mandates from businesses.
  • With Russia enduring its worst wave of the pandemic, Moscow announced a lockdown Thursday — a move the Kremlin had previously said it would avoid at all costs.
  • Domestic airlines this week reported earnings that topped expectations, expressing optimism their financial outlook would continue to improve as the industry weans itself from government assistance that expired last month.