Study suggests Pfizer COVID-19 vaccine may only partially protect against Omicron


There is not significant data yet on how vaccines from Moderna, Johnson & Johnson and other drugmakers hold up against the new variant. All the manufacturers, including Pfizer, are expected to release their own data within weeks

The Omicron variant of the coronavirus can partially evade the protection from Pfizer Inc and partner BioNTech's COVID-19 vaccine, the research head of a laboratory at Africa Health Research Institute in South Africa said on Tuesday.

Alex Sigal, a professor at the Africa Health Research Institute, said on Twitter there was "a very large drop" in neutralization of the Omicron variant relative to an earlier strain of COVID. The lab tested blood from 12 people who had been vaccinated with the Pfizer/BioNTech vaccine, according to a manuscript posted on the website for his lab. The preliminary data in the manuscript has not yet been peer reviewed.

Blood from five out of six people who had been vaccinated as well as previously infected with COVID-19 still neutralized the Omicron variant, the manuscript said.

According to the manuscript, they observed a 41-fold decline in levels of neutralizing antibodies against the Omicron variant.

Sigal said on Twitter that figure is likely to be adjusted after his lab does more experiments.

While neutralizing antibodies are an indicator of the body's immune response, scientists believe other kinds of cells such as B-cells and T-cells also are stimulated by the vaccines and help protect against the effects of coronavirus.

The Omicron variant, first detected in southern Africa last month, has triggered alarms globally of another surge in infections, with more than two dozen countries from Japan to the United States reporting cases.

The World Health Organization on Nov. 26 classified it as a "variant of concern" but said there was no evidence to support the need for new vaccines specifically designed to tackle the Omicron variant with its many mutations.

There is not significant data yet on how vaccines from Moderna, Johnson & Johnson and other drugmakers hold up against the new variant. All the manufacturers, including Pfizer, are expected to release their own data within weeks.

Top U.S. infectious disease expert Dr. Anthony Fauci said on Tuesday that preliminary evidence indicates that the Omicron variant of the coronavirus likely has a higher degree of transmissibility but is less severe.

He said the United States was doing its own tests to determine the protectiveness of the current vaccines against the variant and expects results sometime next week.

Umer Raffat, an analyst for Evercore ISI, cautioned against reading too much into a single study, noting that there has been significant variability in measuring declines in antibody levels in previous lab studies.

"Let’s wait for additional studies to draw a mosaic," he said.- Reuters

Article type: metered
User Type: anonymous web
User Status:
Campaign ID: 46
Cxense type: free
User access status: 3
Join our Telegram channel to get our Evening Alerts and breaking news highlights

Omicron , Pfizer , Moderna , Johnson & Johnson , vaccines ,

   

Next In Business News

Nasdaq futures slump 2% as rising yields spark tech rout
UK employers add record number of jobs, unemployment falls
Starbucks ties up with Meituan to bolster presence in crucial China market
Australian shares slip as healthcare, banking stocks drag
China has plenty policy tools in reserve to cope with slowing economy - state planner
BOJ raises inflation forecasts, maintains ultra-easy policy
US yields up along the curve as traders brace for hawkish Fed
Oil rises to more than 7-year high on Mideast tensions
China Merchants Bank-backed SPAC files first application under new Hong Kong rules
Asia shares tick higher as spotlight stays on Fed

Others Also Read


Vouchers