More than 25 million cases of coronavirus have now been confirmed across the United States. Experts say the true number is likely to be higher. More than 417,500 in the US have died with the virus.
The daily number of deaths has exceeded 4,000 in recent weeks - including on Wednesday when Joe Biden was sworn into office.
President Biden signed a raft of new measures last week, including boosting vaccinations and testing.
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Covid-19: US tops 25 million coronavirus cases - BBC News