Linda Johnson

AP Business Writer

President Joe Biden speaks about efforts to combat COVID-19, in the State Dining Room of the White House, Tuesday, March 2, 2021, in Washington.

Biden Vows Enough Vaccine for All US Adults by End of May

Biden’s announcements quickly raised expectations for when the nation could safely emerge from the pandemic.

Mike McDermott, president of global supply since 2019.

Insider Q&A: Pfizer Exec on Ramping Up Vaccine Supply

"We look at reducing wait times when changing over between batches, doubling of our batch size, increasing yields per batch."

This Sept. 2020 photo provided by Johnson & Johnson shows a clinician preparing to administer investigational Janssen COVID-19 vaccine.

J&J 1-Dose Shot Works, Less Effective Than Others

It appears to protect against COVID-19, but not as strongly as some two-shot rivals.

In this Nov. 9, 2020, file photo, pedestrians walk past Pfizer world headquarters in New York. Pfizer announced Wednesday, Nov. 18, 2020, more results in its ongoing coronavirus vaccine study that suggest the shots are 95% effective a month after the first dose.

Pfizer: COVID-19 Shot 95% Effective, Seeking Clearance Soon

New data suggests the vaccine works even better than Pfizer initially reported.

I Stock 1154450279

Pfizer Says COVID-19 Vaccine Looks 90% Effective

The data would put the company on track to apply for emergency-use approval from the FDA.

A single-dose COVID-19 vaccine being developed by Johnson & Johnson.

Late-Stage Study of First Single-Shot Vaccine Begins in US

U.S. health officials insist the race for a vaccine isn't cutting corners.