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Pfizer Inc. on Tuesday raised its forecast for annual sales of its COVID-19 vaccine by $2 billion to $34 billion on demand for Omicron-targeted boosters, helping allay some investor worries over growth for the vaccinations.

The U.S. National Institutes of Health’s $1 billion RECOVER Initiative has picked Pfizer Inc.’s antiviral drug Paxlovid as the first treatment it will study in patients with long COVID, organizers of the study said on Thursday.

U.S. President Joe Biden will get his updated COVID-19 vaccine on Tuesday and urge more Americans to get the latest shot, White House spokesman Kevin Munoz said on Sunday.

The pharmaceutical giant, still riding high on the sales of Comirnaty and Paxlovid, is looking to a future of innovative oncology drugs and vaccines based on mRNA technology.

A rebound of COVID-19 symptoms in some patients after taking Pfizer’s antiviral Paxlovid may be related to a robust immune response rather than a weak one, U.S. government researchers reported on Thursday.

Recent studies have shown that patients with weakened immune systems — which enables the virus that causes COVID-19 to remain longer in the body, copy itself, and continually change — may enable the development of new, slightly different versions of the virus (variants).

Company CEO Albert Bourla has received four doses of the COVID vaccine developed by Pfizer and its German partner BioNTech but said he has not yet taken the new bivalent booster.

In an interview, WHO senior adviser Bruce Aylward warned that richer nations must not step back from tackling COVID-19 as a global problem now, ahead of future potential waves of infection.

Pfizer Inc said on Thursday it would supply up to 6 million courses of its COVID-19 antiviral treatment to NGO Global Fund for low- and middle-income countries that seeks to address worldwide disparities in COVID response.

The company has donated 100,000 courses of its COVID-19 antiviral treatment Paxlovid to a new group aiming to improve access to the drug in low and middle-income countries.