Connect with us

Health

US study suggests COVID vaccines may be ineffective against omicron without boosters

All three US-authorized COVID-19 vaccines appear to be significantly less protective against the newly-detected omicron variant of the coronavirus in laboratory testing, but a booster dose likely restores most of the protection, according to a study released on Tuesday.

The study from researchers at Massachusetts General Hospital (MGH), Harvard and MIT that has not yet been peer reviewed tested blood from people who received the Moderna, Johnson & Johnson and Pfizer/BioNTech vaccines against a pseudovirus engineered to resemble the omicron variant.

For more coronavirus news, visit our dedicated page.

The researchers found “low to absent” antibody neutralization of the variant from the regular regimens of all three vaccines – two shots of the Moderna or Pfizer/BioNTech vaccines or one of J&J's single-dose vaccine.

But the blood from recent recipients of an additional booster dose exhibited potent neutralization of the variant, the study found.

The scientists also suggested that omicron is more infectious than previous variants of concern, including about twice as transmissible as the currently dominant Delta variant, which may soon be overtaken by omicron.

The results are in line with other studies recently published. Researchers at the University of Oxford said on Monday that they found the two-dose Pfizer and AstraZeneca COVID-19 vaccine regimens do not induce enough neutralizing antibodies against the new variant.

BioNTech and Pfizer said last week that a three-shot course of their COVID-19 vaccine was able to neutralize the new omicron variant in a laboratory test, but two doses resulted in significantly lower neutralizing antibodies.

Moderna and J&J have yet to release any of their own data about how the vaccines perform against the new variant. J&J declined to comment on the new study and Moderna did not respond to request for comment.

For the latest headlines, follow our Google News channel online or via the app.

Read more:

Pfizer confirms experimental COVID pill appears effective against omicron variant

Israeli study finds Pfizer COVID-19 booster protects against Omicron

Two weeks into the Omicron outbreak: Where to from here?

Continue Reading
Click to comment

Leave a Reply

Your email address will not be published.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

Health

WHO launches bid to tackle inequalities behind global breast cancer threat

A UN-led global initiative to tackle breast cancer could save 2.5 million lives by 2040, the World Health Organization (WHO) said on Friday, just ahead of World Cancer Day.

Continue Reading

Health

Fake medicines kill almost 500,000 sub-Saharan Africans a year: UNODC report

Trafficked medical products kill almost half a million sub-Saharan Africans every year, and action is needed to stem the flow, the United Nations Office on Drugs and Crime (UNODC) states in its new threat assessment report.

Continue Reading

Health

African leaders commit to end AIDS among children by 2030

UN agencies have welcomed a pledge by 12 African countries to end AIDS in children by 2030, announced on Wednesday at a meeting in Dar Es Salaam, Tanzania.

Continue Reading

Trending