Beautiful Virgin Islands

Tuesday, Jun 03, 2025

Pfizer, Moderna Vaccines Highly Effective Even After 1st Shot: US Study

Pfizer, Moderna Vaccines Highly Effective Even After 1st Shot: US Study

The risk of infection fell 90 per cent by two weeks after the second shot, the study of just under 4,000 people found.
COVID-19 vaccines developed by Pfizer Inc with BioNTech SE and Moderna Inc reduced the risk of infection by 80 per cent two weeks or more after the first of two shots, according to data from a real-world study of vaccinated US healthcare personnel and first responders released on Monday.

The risk of infection fell 90 per cent by two weeks after the second shot, the study of just under 4,000 people found.

The study by the US Centers for Disease Control and Prevention (CDC) evaluated the vaccines' ability to protect against infection, including infections that did not cause symptoms. Previous clinical trials by the companies evaluated their vaccine's efficacy in preventing illness from COVID-19.

"This study shows that our national vaccination efforts are working," CDC Director Rochelle Walensky said in a statement.

The findings from of the real-world use of these messenger RNA (mRNA) vaccines confirm what was seen in large controlled clinical trials conducted before they received emergency use authorizations from the U.S. Food and Drug Administration.

The study looked at the effectiveness of the mRNA vaccines among 3,950 participants in six states over a 13-week period from Dec. 14, 2020 to March 13, 2021.

"The authorized mRNA COVID-19 vaccines provided early, substantial real-world protection against infection for our nation's healthcare personnel, first responders, and other frontline essential workers," Walensky said.

The new mRNA technology is a synthetic form of a natural chemical messenger being used to instruct cells to make proteins that mirror part of the novel coronavirus. That teaches the immune system to recognize and attack the actual virus.
Newsletter

Related Articles

Beautiful Virgin Islands
0:00
0:00
Close
Dutch government falls as far-right leader Wilders quits coalition
Harvard Urges US to Unfreeze Funds for Public Health Research
Businessman Mauled by Lion at Luxury Namibian Lodge
Researchers Consider New Destinations Beyond the U.S.
53-Year-Old Doctor Claims Biological Age of 23
Trump Struggles to Secure Trade Deals With China and Europe
Russia to Return 6,000 Corpses Under Ukraine Prisoner Swap Deal
Microsoft Lays Off Hundreds More Amid Restructuring
Harvey Weinstein’s Publicist Embraces Notoriety
Macron and Meloni Seek Unity Despite Tensions
Trump Administration Accused of Obstructing Deportation Cases
Newark Mayor Sues Over Arrest at Immigration Facility
Center-Left Candidate Projected to Win South Korean Presidency
Trump’s Tariffs Predicted to Stall Global Economic Growth
South Korea’s President-Elect Expected to Take Softer Line on Trump and North Korea
Trump’s China Strategy Remains a Geopolitical Puzzle
Ukraine Executes Long-Range Drone Strikes on Russian Airbases
Conservative Karol Nawrocki wins Poland’s presidential election
Study Identifies Potential Radicalization Risk Among Over One Million Muslims in Germany
Good news: Annalena Baerbock Elected President of the UN General Assembly
Apple Appeals EU Law Over User Data Sharing Requirements
South Africa: "First Black Bank" Collapses after Being Looted by Owners
Poland will now withdraw from the EU migration pact after pro-Trump nationalist wins Election
"That's Disgusting, Don’t Say It Again": The Trump Joke That Made the President Boil
Trump Cancels NASA Nominee Over Democratic Donations
Paris Saint-Germain's Greatest Triumph Is Football’s Lowest Point
OnlyFans for Sale: From Lockdown Lifeline to Eight-Billion-Dollar Empire
Mayor’s Security Officer Implicated | Shocking New Details Emerge in NYC Kidnapping Case
Hegseth Warns of Potential Chinese Military Action Against Taiwan
OPEC+ Agrees to Increase Oil Output for Third Consecutive Month
Jamie Dimon Warns U.S. Bond Market Faces Pressure from Rising Debt
Turkey Detains Istanbul Officials Amid Anti-Corruption Crackdown
Taylor Swift Gains Ownership of Her First Six Albums
Bangkok Ranked World's Top City for Remote Work in 2025
Satirical Sketch Sparks Political Spouse Feud in South Korea
Indonesia Quarry Collapse Leaves Multiple Dead and Missing
South Korean Election Video Pulled Amid Misogyny Outcry
Asian Economies Shift Away from US Dollar Amid Trade Tensions
Netflix Investigates Allegations of On-Set Mistreatment in K-Drama Production
US Defence Chief Reaffirms Strong Ties with Singapore Amid Regional Tensions
Vietnam Faces Strategic Dilemma Over China's Mekong River Projects
Malaysia's First AI Preacher Sparks Debate on Islamic Principles
White House Press Secretary Criticizes Harvard Funding, Advocates for Vocational Training
France to Implement Nationwide Smoking Ban in Outdoor Spaces Frequented by Children
Meta and Anduril Collaborate on AI-Driven Military Augmented Reality Systems
Russia's Fossil Fuel Revenues Approach €900 Billion Since Ukraine Invasion
U.S. Justice Department Reduces American Bar Association's Role in Judicial Nominations
U.S. Department of Energy Unveils 'Doudna' Supercomputer to Advance AI Research
U.S. SEC Dismisses Lawsuit Against Binance Amid Regulatory Shift
Alcohol Industry Faces Increased Scrutiny Amid Health Concerns
×