Prior Covid offers less protection vs Omicron; mRNA booster shot efficacy declines within months
Skip to main content
  • Home
  • Economy
  • Stocks
  • Analysis
  • World+Biz
  • Sports
  • Features
  • Epaper
  • More
    • Subscribe
    • COVID-19
    • Bangladesh
    • Splash
    • Videos
    • Games
    • Long Read
    • Infograph
    • Interviews
    • Offbeat
    • Thoughts
    • Podcast
    • Quiz
    • Tech
    • Archive
    • Trial By Trivia
    • Magazine
    • Supplement
  • বাংলা
The Business Standard

Wednesday
June 29, 2022

Sign In
Subscribe
  • Home
  • Economy
  • Stocks
  • Analysis
  • World+Biz
  • Sports
  • Features
  • Epaper
  • More
    • Subscribe
    • COVID-19
    • Bangladesh
    • Splash
    • Videos
    • Games
    • Long Read
    • Infograph
    • Interviews
    • Offbeat
    • Thoughts
    • Podcast
    • Quiz
    • Tech
    • Archive
    • Trial By Trivia
    • Magazine
    • Supplement
  • বাংলা
WEDNESDAY, JUNE 29, 2022
Prior Covid offers less protection vs Omicron; mRNA booster shot efficacy declines within months

Coronavirus chronicle

Reuters
15 February, 2022, 02:05 pm
Last modified: 15 February, 2022, 05:03 pm

Related News

  • US medical experts call for Omicron-specific Covid boosters
  • Omicron sub variant dominant in Bangladesh since May : Report
  • Some Omicron sub-variants escaping antibodies from Sinopharm shot
  • Early Omicron infection unlikely to protect against current variants
  • Early Omicron infection unlikely to protect against current variants

Prior Covid offers less protection vs Omicron; mRNA booster shot efficacy declines within months

The immune response to Covid-19 helps protect against reinfection, but that protection is weaker against Omicron than it was against earlier variants of the coronavirus, according to new data

Reuters
15 February, 2022, 02:05 pm
Last modified: 15 February, 2022, 05:03 pm
Test tube labelled "Covid-19 Omicron variant test positive" is seen in this illustration picture taken January 15, 2022. Photo :Reuters
Test tube labelled "Covid-19 Omicron variant test positive" is seen in this illustration picture taken January 15, 2022. Photo :Reuters

The following is a summary of some recent studies on Covid-19. They include research that warrants further study to corroborate the findings and that has yet to be certified by peer review.

Previous Covid-19 less protective against Omicron variant

The immune response to Covid-19 helps protect against reinfection, but that protection is weaker against Omicron than it was against earlier variants of the coronavirus, according to new data.

A previous SARS-CoV-2 infection protects against Omicron reinfection only 56% of the time, researchers found in a review of national data in Qatar. Having had Covid was 90.2% effective against reinfection with the Alpha variant, 85.7% effective against a Beta variant reinfection, and 92% effective against Delta reinfection, researchers reported on Wednesday in The New England Journal of Medicine.

As was the case with reinfection due to earlier variants, however, "the protection of previous infection against hospitalization or death caused by reinfection (with Omicron) appeared to be robust," they said. In cases of reinfection with Omicron, for example, the immune response to previous infection was 87.8% effective at preventing the second infection from progressing to severe or critical illness or death.

mRNA vaccine booster protection declines within months

Protection provided by booster shots of the mRNA vaccines from Moderna Inc or Pfizer Inc and partner BioNTech SE starts waning quickly, according to data published in Friday's Morbidity and Mortality Weekly Report  from the US Centers for Disease Control and Prevention (CDC).

Researchers reported that within two months after the second dose of an mRNA vaccine during the surge in infections caused by the Delta variant of the virus, vaccine efficacy was 94% against hospitalization and 92% against emergency department or urgent care (ED/UC) visits. Efficacy waned thereafter, but climbed to 96% and 97%, respectively, at two months after a booster shot. Four months later, however, that protection had declined to 76% and 89%. Once Omicron became predominant, vaccine efficacy was 71% against hospitalization and 69% against ED/UC visits within two months after the second dose, 91% and 87% at two months after a booster, and 78% and 66% four months later. The estimates are drawn from analyses of 241,204 Covid-related ED/UC visits and 93,408 hospitalizations between August and January.

"Our findings suggest that additional doses (of vaccines) may be necessary," Brian Dixon of the Regenstrief Institute and Indiana University said in a statement. "We also found that people who are Hispanic or Black are half as likely to have a third vaccine dose than people who are white, making (them) more vulnerable to severe Covid."

Top News / World+Biz

omicron / mRNA / booster

Comments

While most comments will be posted if they are on-topic and not abusive, moderation decisions are subjective. Published comments are readers’ own views and The Business Standard does not endorse any of the readers’ comments.

Top Stories

  • Photo: Collected
    Student arrested for killing Savar teacher with cricket stump
  • Bangladesh sets world’s record high GDP growth from 2009-2019
    Bangladesh sets world’s record high GDP growth from 2009-2019
  • File Photo: UNB
    BSMMU prison cell becomes a resort for VIP prisoners: ACC

MOST VIEWED

  • Test tubes are seen in front of displayed Pfizer and Biontech logos in this illustration taken, May 21, 2021. Reuters: llustration
    BioNTech, Pfizer to start testing universal vaccine for coronaviruses
  • A woman holds a small bottle labelled with a "Coronavirus COVID-19 Vaccine" sticker and a medical syringe in this illustration taken October 30, 2020. REUTERS/Dado Ruvic/File Photo
    S Korea approves first domestically developed Covid vaccine
  • Photo: Collected
    US medical experts call for Omicron-specific Covid boosters
  • David E Adler. Sketch: TBS
    Who managed Covid-19 best, and why?
  • People line up at a nucleic acid testing station, following the coronavirus disease (COVID-19) outbreak, in Beijing, China, June 16, 2022. REUTERS/Thomas Peter/File Photo
    China slashes Covid quarantine time for international travellers
  • Covid-19 deaths were reported from Gorakhpur, Jalaun, Bulandshahr, Kannauj, Sonbhadra, Gonda, Bhadohi, Basti, Kushinagar and Mau (HT Photo)
    India sees 45% jump in a day with 17,073 new Covid cases

Related News

  • US medical experts call for Omicron-specific Covid boosters
  • Omicron sub variant dominant in Bangladesh since May : Report
  • Some Omicron sub-variants escaping antibodies from Sinopharm shot
  • Early Omicron infection unlikely to protect against current variants
  • Early Omicron infection unlikely to protect against current variants

Features

Mahathir accused financial titans of seeking to reverse decades of economic development that propelled tens of millions into the middle class. Photo: Bloomberg

George Soros, Mahathir and the legacy of 1997

6h | Panorama
 If Bangladesh produces and exports high-value-added MMF products right now, we can increase our total export by around 25% in value. Photo: Mumit M

Time ripe for Bangladesh RMG sector to focus more on man-made fibres

10h | Panorama
Human Library Bangladesh has organised so far nine sessions; eight have been held in different parts of Dhaka and one in Khulna. Photo: Courtesy

Human Library Bangladesh: Where the halls come alive with human voices

11h | Panorama
Abortion is a part of healthcare. Photo: Bloomberg

Abortion is healthcare and women’s rights are human rights

1d | Panorama

More Videos from TBS

Beautiful mural at Padma bridge

Beautiful mural at Padma bridge

3h | Videos
Ferry terminals wear deserted look, traders fear losses

Ferry terminals wear deserted look, traders fear losses

4h | Videos
Top 10: World’s longest bridges

Top 10: World’s longest bridges

5h | Videos
Archeological artefacts getting ruined locked in store room

Archeological artefacts getting ruined locked in store room

9h | Videos

Most Read

1
Padma Bridge from satellite. Photo: Screengrab
Bangladesh

Padma Bridge from satellite 

2
Photo: TBS
Bangladesh

Motorcycles banned on Padma Bridge 

3
Japan cancels financing Matarbari coal project phase 2
Bangladesh

Japan cancels financing Matarbari coal project phase 2

4
Photo: Courtesy
Corporates

Gree AC being used in all parts of Padma Bridge project

5
Photo: TBS
Infrastructure

Gains from Padma Bridge to cross $10b, hope experts

6
Desco wanted to make a bold statement with their new head office building, a physical entity that would be a corporate icon. Photo: Courtesy
Habitat

Desco head office: When commitment to community and environment inspires architecture

EMAIL US
contact@tbsnews.net
FOLLOW US
WHATSAPP
+880 1847416158
The Business Standard
  • About Us
  • Contact us
  • Sitemap
  • Privacy Policy
  • Comment Policy
Copyright © 2022
The Business Standard All rights reserved
Technical Partner: RSI Lab
BENEATH THE SURFACE
An aerial view of a MRT Line-6 construction site. Work on the first elevated metro rail of Bangladesh is going on in full swing. A total of 16 elevated stations will connect the capital’s Uttara to Motijheel via Mirpur, Farmgate and Dhaka University. The photo was taken from Farmgate area recently. Photo: Rajib Dhar

Contact Us

The Business Standard

Main Office -4/A, Eskaton Garden, Dhaka- 1000

Phone: +8801847 416158 - 59

Send Opinion articles to - oped.tbs@gmail.com

For advertisement- sales@tbsnews.net