Pfizer Covid Vaccine Reduces Transmission After One Dose: UK Study.

Pfizer Covid Vaccine Reduces Transmission After One Dose: UK Study

The study and its results have yet to be independently peer-reviewed by other scientists.

London:

A single dose of Pfizer and BioNtech's COVID-19 vaccine cuts the number of asymptomatic infections and could significantly reduce the risk of transmission of the virus, results of a UK study found on Friday.

Researchers analysed results from thousands of COVID-19 tests carried out each week as part of hospital screenings of healthcare staff in Cambridge, eastern England.

"Our findings show a dramatic reduction in the rate of positive screening tests among asymptomatic healthcare workers after a single dose of the Pfizer-BioNTech vaccine," said Nick Jones, an infectious diseases specialist at Cambridge University Hospital, who co-led the study.

After separating the test results from unvaccinated and vaccinated staff, Jones' team found that 0.80% tests from unvaccinated healthcare workers were positive.

This compared with 0.37% of tests from staff less than 12 days post-vaccination - when the vaccine's protective effect is not yet fully established - and 0.20% of tests from staff at 12 days or more post-vaccination.

The study and its results have yet to be independently peer-reviewed by other scientists, but were published online as a preprint on Friday.

This suggests a four-fold decrease in the risk of asymptomatic COVID-19 infection amongst healthcare workers who have been vaccinated for more than 12 days, and 75% protection, said Mike Weekes, an infectious disease specialist at Cambridge University's department of medicine, who co-led the study.

The level of asymptomatic infection was also halved in those vaccinated for less than 12 days, he said.

Britain has been rolling out vaccinations with both the Pfizer COVID-19 shot and one from AstraZeneca since late December 2020.

"This is great news -- the Pfizer vaccine not only provides protection against becoming ill from SARS-CoV-2, but also helps prevent infection, reducing the potential for the virus to be passed on to others," Weeks said. "But we have to remember that the vaccine doesn't give complete protection for everyone."

Key real-world data published on Wednesday from Israel, which has conducted one of the world's fastest rollouts of Pfizer's COVID-19 vaccine, showed that two doses of the Pfizer shot cut symptomatic COVID-19 cases by 94% across all age groups, and severe illnesses by nearly as much.

(Except for the headline, this story has not been edited by NDTV staff and is published from a syndicated feed.)

NDTV News

NDTV.com provides latest news from India and the world. Get today’s news headlines from Business, Technology, Bollywood, Cricket, videos, photos, live news coverage and exclusive breaking news from India.

https://www.ndtv.com/

Related news

Joe Biden Hits Golf Course For First Time In Presidency.

President Joe Biden played golf for the first time in his presidency Saturday, hitting the fairways in his home city of Wilmington -- and taking a page from his golf-obsessed predecessor Donald...

NDTV News

NBC Nightly News Broadcast (Full) - March 15th, 2021 - NBC Nightly News.

NBC Nightly News Broadcast (Full) - March 15th, 2021 - NBC Nightly News.

Pfizer CEO says Covid booster shot likely needed within 12 months, body cam footage released in fatal police shooting of 13-year-old Adam Toledo, and defense rests in Derek Chauvin trial. Watch “NBC Nightly News With Lester Holt” at 6:30 p.m. ET /...

Legal expert discusses Daunte Wright shooting, Derek Chauvin trial.

Legal expert discusses Daunte Wright shooting, Derek Chauvin trial.

Civil rights attorney Channa Lloyd brings viewers up to speed on the charges against Kim Potter for shooting Daunte Wright and the winding down of the Derek Chauvin trial. SUBSCRIBE to ABC NEWS: Watch More on LIKE ABC News on FACEBOOK FOLLOW ABC N...

Tucker takes on CNN anchor Don Lemon over 'mansplaining'.

Tucker takes on CNN anchor Don Lemon over 'mansplaining'.

'Tucker Carlson Tonight' host reacts to 'CNN Tonight' anchor's comments on getting ahead at the network. #FoxNews #Tucker Subscribe to Fox News! Watch more Fox News Video: Watch Fox News Channel Live: FOX News Channel (FNC) is a 24-hour all-encomp...

Women rising up against ‘shadow pandemic’ of domestic violence.

Women rising up against ‘shadow pandemic’ of domestic violence.

Nearly one-third of women around the globe have suffered from violent or sexual abuse, which the United Nations has dubbed “the shadow pandemic.” SUBSCRIBE to ABC NEWS: Watch More on LIKE ABC News on FACEBOOK FOLLOW ABC News on TWITTER:

Breaking down Derek Chauvin’s choice to plead the Fifth.

Breaking down Derek Chauvin’s choice to plead the Fifth.

ABC News Contributor Brian Buckmire details the advantages of pleading the Fifth and the defense’s focus on carbon monoxide levels. SUBSCRIBE to ABC NEWS: Watch More on LIKE ABC News on FACEBOOK FOLLOW ABC News on TWITTER:

Michigan governor talks about spring surge of COVID cases in her state.

Michigan governor talks about spring surge of COVID cases in her state.

Gov. Gretchen Whitmer explains why she has resisted calls to shut down her state, which is experiencing a surge in new COVID-19 cases and hospitalizations, including among young adults. SUBSCRIBE to ABC NEWS: Watch More on LIKE ABC News on FACEBOO...