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COVID-19 vaccines never promised perfection. Experts say it's time to curb our highest expectations
By Helen Branswell
As mandates roll out, some may ask for medical exemptions. What's really valid?
By Jacqueline Stenson
CDC advisors raise 'over-vaccination' concern, need more booster data
By Hilary Brueck
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Moderna seeks U.S. authorization for COVID-19 vaccine booster
By Michael Erman & Manojna Maddipatla
Opinion | Take Another Look at the Spacing Between COVID Vaccine Doses
By Martin A. Makary
More Americans getting vaccinated following full FDA approval of Pfizer COVID vaccine
By Arielle Mitropoulos
Trump Says He Is Unlikely to Get Covid-19 Vaccine Booster Shot - WSJ
By Michael Charles Bender
Why a Covid-19 vaccine for younger children is taking longer than a vaccine for adults
By Jen Christensen