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Pfizer also is working to improve its current COVID-19 vaccine “to address any future variant of potential concern, if needed.”
The surge in cases has overwhelmed hospitals nationwide, and about one-quarter face critical staffing shortages.
People who have received COVID-19 vaccines can donate blood and platelets as long as they are symptom-free.
However, grip strength and physical functioning were tied to lower risk for death, regardless of weight.
The announcement comes shortly after Aduhelm maker Biogen cut the price of the drug by about half, from $56,000 to $28,000 a year.
Attorney general offices around the country have reported receiving complaints or hearing stories of price gouging.
The administration plans to launch a website where people can request the rapid tests.
Governments, including the United Kingdom and South Korea, already are ordering the doses in preparation.
Doctors and health systems are in the difficult position of rationing supplies to meet the needs of those in the most dire situations.
The change will be welcome news to people who refrained from traveling for fear they would get stranded in a foreign country.