fbpx
Stylish and compact, these new Canon instant printers make creative pursuits easyRead more Nigerian Law Enforcement agencies open investigations on Hawilti and company executives for criminal breach of trust, cheating, defrauding investors schemeRead more Famine looms in Somalia, but many ‘hunger hotspots’ are in deep troubleRead more Launch of the 3rd Edition of the Choiseul Africa Business Forum, a Must-Attend Event for the Business Community in Africa October 19th & 20th, 2022 in Casablanca, MoroccoRead more World’s Biggest Afrobeats Music Festival Afro Nation Extends Partnership with APO Group until 2025Read more Master Trainer (MT) National Meeting on Sustainable Coffee Practices Organized by The International Islamic Trade Finance Corporation in Collaboration with The Sustainable Coffee Platform of Indonesia (SCOPI)Read more Thai Ambassador met the Thai Community in Dar es Salaam and Zanzibar and visited the Buddhist Temple in TanzaniaRead more Generation Africa awards US$100,000 to two young agripreneurs from Kenya and Uganda in the fourth annual GoGettaz Agripreneur Prize Competition at the African Green Revolution Forum Summit in Kigali, RwandaRead more Medicaid Cancer Foundation and AstraZeneca celebrate Prostate Cancer Awareness month with the launch of Project Icon NigeriaRead more Petroleum Directorate of Sierra Leone to Shape Upstream Dialogue as a Bronze Sponsor at African Energy Week 2022Read more

US authorizes fourth Covid shot for over 50s

show caption
A nurse administers a Pfizer booster vaccine for the Covid-19 coronavirus in Jakarta on March 29, 2022./AFP
Print Friendly and PDF

Mar 30, 2022 - 03:12 AM

WASHINGTON — The United States Tuesday authorized a fourth dose of either the Pfizer-BioNTech or Moderna Covid-19 vaccines for people 50 and older, as authorities warn of a possible new wave driven by the BA.2 variant.

The Food and Drug Administration (FDA) said in a statement it had based its decision on emerging evidence that an additional booster, given four months after the last, improved protection against severe Covid and wasn’t associated with new safety concerns.

Additionally, people with immune compromising conditions who have already received four shots, with their latest at least four months ago, are now eligible for a fifth dose.

That includes people living with certain organ transplants.

The Pfizer vaccine will be available to immune compromised people aged 12 and over, while the Moderna vaccine will be available to those 18 and up.

“Current evidence suggests some waning of protection over time against serious outcomes from Covid-19 in older and immunocompromised individuals,” senior FDA scientist Peter Marks said, explaining the decision.

The FDA said data from Israel, which had studied the effects of a fourth dose given four months after the third on 700,000 people, found the extra shot was safe.

It also cited data from a study of 154 health workers whose antibody levels, including against the Delta and Omicron variants, were restored to high levels two weeks after their fourth doses.

A study published by Israeli researchers in the New England Journal of Medicine this month indicated that three doses of current generation mRNA vaccines have hit a ceiling in terms of the immune response generated.

In other words, while three doses brings immunity levels to new heights, the fourth dose restores antibody levels to where they previously were shortly after the third.

Experts have said the benefits to younger, healthy people aren’t yet clear, and say new vaccines will likely need to be developed as the virus continues to mutate.

LMBCNEWS.COM uses both Facebook and Disqus comment systems to make it easier for you to contribute. We encourage all readers to share their views on our articles and blog posts. All comments should be relevant to the topic. By posting, you agree to our Privacy Policy. We are committed to maintaining a lively but civil forum for discussion, so we ask you to avoid personal attacks, name-calling, foul language or other inappropriate behavior. Please keep your comments relevant and respectful. By leaving the ‘Post to Facebook’ box selected – when using Facebook comment system – your comment will be published to your Facebook profile in addition to the space below. If you encounter a comment that is abusive, click the “X” in the upper right corner of the Facebook comment box to report spam or abuse. You can also email us.