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People with weakened immune systems who already got two doses of the Pfizer or Moderna COVID-19 vaccines can now get a third shot. But exactly who is eligible? Here's what we know so far.

Scientists who warned of heat waves and rising seas this week also say that it's possible to avoid the worst effects of the warming climate. They're relying on computer models of the world economy.

She was celebrated in folk and country-music circles for her crystalline voice and storytelling skill.

The global combined land and ocean-surface temperature was 1.67 degrees Fahrenheit above the 20th-century average, according to NOAA, the hottest in 142 years of record-keeping.

Starting this fall, Canada's government will also require all federal workers to be vaccinated, citing a "dynamic public health situation" due to the COVID-19 pandemic.

The CDC is officially recommending a third dose of the Pfizer or Moderna vaccine for people with weakened immune systems. It follows the FDA authorization a day earlier.

Researchers looked at the impact of free masks, text reminders and celebrity endorsements. It's unclear if the best strategies will help counter anti-mask sentiment in the U.S. during the delta surge.

Last year's tournament was canceled outright for the first time in its history. Officials say thousands of spectators would pose too great a risk at this year's tourney.

A California father took his two young children to Mexico and killed them after he claimed he had been "enlightened by QAnon and Illuminati conspiracy theories," federal authorities say.

Early data shows that after the child tax credit payments started going out this summer, the number of households with children who experience food insufficiency dropped.