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Immunology

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Tumbling COVID-19 case counts have some schools around the U.S. considering relaxing their mask rules, but deaths nationally have been ticking up over the past few weeks, some rural hospitals are showing signs of strain, and cold weather is setting in.

Kid-size doses of Pfizer's COVID-19 vaccine appear safe and nearly 91% effective at preventing symptomatic infections in 5- to 11-year-olds, according to study details released Friday as the U.S. considers opening vaccinations to that age group.

Yesterday I innocently sat down in the dentist's chair for a routine cleaning and turned to my nice hygienist asking, "are you vaccinated?" Sh…

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WASHINGTON (AP) — The U.S. on Thursday donated its 200 millionth COVID-19 shot to help vaccinate the rest of the world, the White House announced. The Biden administration aims to lead a global vaccination campaign even as it rolls out boosters for domestic use, which critics say diverts doses from those who are in greater need around the world.

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WASHINGTON (AP) — U.S. regulators on Wednesday signed off on extending COVID-19 boosters to Americans who got the Moderna or Johnson & Johnson vaccine and said anyone eligible for an extra dose can get a brand different from the one they received initially.

More COVID-19 booster shots may be on the way — but when it's your turn, you'll get an extra dose of the original vaccine, not one updated to better match the extra-contagious delta variant.

Infants born to coronavirus-infected mothers have a much higher chance of health problems such as difficulty breathing compared with the newborns of moms without COVID-19, a new study shows.

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