Pfizer said on Thursday the US government would pay $5.29bn for 10-million courses of its experimental Covid-19 antiviral drug, as the country rushes to secure promising oral treatments for the disease.

The deal is roughly twice the size of the contract the US government has with Merck, although the price for the Pfizer pill is lower at roughly $530 per course compared with about $700 for Merck's.

Pfizer applied for emergency authorisation of the drug, branded Paxlovid, this week after reporting data showing that it was 89% effective at preventing hospitalisation or death in at-risk people.

“While this pill still requires a full review by the Food and Drug Administration (FDA), I have taken immediate steps to secure enough supply for the American people,” President Joe Biden said in a statement. He added that his administration was making preparations to ensure the treatment was easily accessible and free.

Pfizer said it would begin deliveries of the treatment as soon as this year if it is authorised by the US FDA.

Shares of Pfizer rose 1% to $51.40 in early trading, while those of Merck were marginally lower.

Getting vaccinated should still be the priority for Americans but having pills that can keep people out of the hospital “could be a lifesaver”, said the department of health and human services secretary Xavier Becerra.

Pfizer has said it expects to manufacture 180,000 treatment courses by the end of December and at least 50-million courses by the end of 2022.

Countries have scrambled to secure doses of the Pfizer and Merck oral drugs, based on promising data reported by both companies.

The US government has so far secured 3.1-million courses of Merck’s Covid-19 pill for $2.2bn, with the right to buy 2-million more courses in the future.



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