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WATCH LIVE: Federal officials hold briefing on Operation Warp Speed for COVID-19 vaccine

Briefing will be livestreamed in this article

FILE - In this March 16, 2020, file photo, Neal Browning receives a shot in the first-stage safety study of a potential vaccine for COVID-19 at the Kaiser Permanente Washington Health Research Institute in Seattle. Moderna Inc., said Monday, Nov. 16, its COVID-19 vaccine is proving to be highly effective in a major trial. (AP Photo/Ted S. Warren, File)
FILE - In this March 16, 2020, file photo, Neal Browning receives a shot in the first-stage safety study of a potential vaccine for COVID-19 at the Kaiser Permanente Washington Health Research Institute in Seattle. Moderna Inc., said Monday, Nov. 16, its COVID-19 vaccine is proving to be highly effective in a major trial. (AP Photo/Ted S. Warren, File) (Copyright 2020 The Associated Press. All rights reserved.)

WASHINGTON D.C. – Federal officials on Wednesday are expected to hold a briefing on Operation Warp Speed, an initiative from the Trump Administration to develop a vaccine for COVID-19 as it continues to resurge in the U.S.

The briefing will include Army Gen. Gustave F. Perna, chief operations officer for Operation Warp Speed; Health and Human Services Secretary Alex M. Azar II; and Dr. Moncef Slaoui, chief advisor for Operation Warp Speed.

The briefing is scheduled to begin at 11:45 a.m. and it will be livestreamed in this article. Delays are possible; if there is not a livestream available, check back at a later time.

Pfizer said Wednesday that new test results show its coronavirus vaccine is 95% effective, is safe and also protects older people who are most at risk of dying — the last data needed to seek emergency use of limited shot supplies as the catastrophic outbreak worsens across the globe.

The announcement from Pfizer and its German partner BioNTech, just a week after they revealed the first promising preliminary results, comes as the team is preparing within days to formally ask U.S. regulators to allow emergency use of the vaccine.

They also have begun “rolling submissions” for the vaccine with regulators in Europe, the U.K. and Canada and soon will add this new data.

Pfizer and BioNTech had initially estimated the vaccine was more than 90% effective after 94 infections had been counted in a study that included 44,000 people. With the new announcement, the company now has accumulated 170 infections in the study -- and said only eight of them occurred in volunteers who got the actual vaccine rather than a dummy shot. One of those eight developed severe disease, the company said.

“This is an extraordinarily strong protection,” Dr. Ugur Sahin, BioNTech's CEO and co-founder, told The Associated Press.

The companies have not yet released detailed data on their study, and results have not been analyzed by independent experts. Also still to be determined are important questions such as how long protection lasts and whether people might need boosters.

But all eyes are on the progress of potential vaccines as the grim infection rate jumps in the U.S. and abroad as winter weather forces people indoors, in the close quarters that fuels viral spread.

Pfizer and BioNTech said the vaccine was more than 94% effective in adults over age 65, though it is not clear exactly how that was determined with only eight infections in the vaccinated group to analyze and no breakdown provided of those people’s ages.

Sahin said there were enough older adults enrolled in the study and among the placebo recipients who became infected that he is confident “this vaccine appears to work in the higher-risk population.”

Earlier this week Moderna, Inc. announced that its experimental vaccine appears to be 94.5% effective after an interim analysis of its late-stage study.


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