Connect with us

Hi, what are you looking for?

Economy

Pfizer, Moderna COVID-19 vaccines highly effective after first shot — US study

COVID-19 vaccines developed by Pfizer, Inc. with BioNTech SE and Moderna, Inc. reduced risk of infection by 80% two weeks or more after the first of two shots, according to data from a real-world US study released on Monday.

The risk of infection fell 90% by two weeks after the second shot, the study of nearly 4,000 US healthcare personnel and first responders found.

The results validate earlier studies that had indicated the vaccines begin to work soon after a first dose, and confirm that they also prevent asymptomatic infections.

Some countries dealing with limited vaccine supplies have pushed back schedules for second doses with the hope of getting some protection to more people. US public health officials, however, continue to recommend two doses be given on the schedule authorized by regulators based on clinical trials.

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 coronavirus disease 2019 (COVID-19), but those studies would have missed asymptomatic infections.

The findings of the real-world use of these messenger RNA (mRNA) vaccines also confirm the efficacy demonstrated in the large controlled clinical trials conducted before they received emergency use authorizations from the US 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. About 74% had at least one shot, and tests were conducted weekly to catch any infections without symptoms.

“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,” CDC Director Rochelle Walensky said in a statement.

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.

The CDC study comes weeks after real-world data from Israel suggested that the Pfizer/BioNTech vaccine was 94% effective in preventing asymptomatic infections.

Britain and Canada were among the countries that have allowed extended gaps between doses of up to three or four months. UK authorities said in Jan. that data supported its decision for a 12-week gap between doses.

Pfizer and its German partner have warned that they had no evidence to prove that. In their pivotal trials, there was a three-week gap between Pfizer shots and four weeks for the Moderna vaccine.

The CDC said the study results on Monday provide reassurance that people start to develop protection from the vaccine two weeks after their first dose, although the agency reiterated that the greatest protection was seen among those who had received both recommended doses of the vaccines. — Reuters

Click to comment

Leave a Reply

Your email address will not be published. Required fields are marked *

Get the daily email that makes reading the news actually enjoyable. Stay informed and entertained, for free.
Your information is secure and your privacy is protected. By opting in you agree to receive emails from us. Remember that you can opt-out any time, we hate spam too!

Latest

Investing

A UK-backed mission which will search for Earth-like planets orbiting alien stars has been given the green light to continue with its development after...

Investing

According to a new survey a staggering 3 out of 5 UK professionals are unhappy with their current salary. The study, which surveyed 1,500...

Investing

A mental health crisis is looming among small business owners – with 82% reporting that their mental health has already declined due to the...

Investing

One of Britain’s biggest banks has called on the “social conscience” of large businesses to encourage them to settle bills to small and medium-sized...

Investing

The UK’s deep regional divides are widening despite the government’s promises to level up the country, a think tank for the north of England...

Investing

Britons are consuming too much alcohol at home due to sessions lasting longer than pub visits, an expert said, after data suggested millions of...

You May Also Like

Investing

Having a good Instagram marketing agency to back up your Instagram account is an absolute must going into the new year. With competition stronger...

Economy

Ivermectin, an existing drug against parasites including head lice, has had a checkered history when it comes to treating COVID-19. The bulk of studies...

Investing

Insomnia is the most common sleep disorder in the global population. Therefore, it is a problem that many people suffer or have suffered throughout...

Investing

As a traditionally rigid insurance industry becomes bogged down by antiquated processes and operations, a handful of industry leaders are seeking to shake things...

Disclaimer: SmartRetirementReport.com, its managers, its employees, and assigns (collectively "The Company") do not make any guarantee or warranty about what is advertised above. Information provided by this website is for research purposes only and should not be considered as personalized financial advice. The Company is not affiliated with, nor does it receive compensation from, any specific security. The Company is not registered or licensed by any governing body in any jurisdiction to give investing advice or provide investment recommendation. Any investments recommended here should be taken into consideration only after consulting with your investment advisor and after reviewing the prospectus or financial statements of the company.

Copyright © 2021 SmartRetirementReport. All Rights Reserved.