Pfizer Inc said on Monday it would spend $120 million to expand manufacturing of its COVID-19 antiviral treatment at its Michigan plant, as demand ramps up.

Use of the pill, Paxlovid, authorized to treat newly infected, at-risk people to prevent severe illness, has soared recently as infections rise.

US doctors reconsider Pfizer’s Paxlovid for lower-risk COVID patients

Biden administration officials have pushed for the wider use of Paxlovid, which the government distributes for free.