May 14, 2026 04:45 am (IST)
Follow us:
facebook-white sharing button
twitter-white sharing button
instagram-white sharing button
youtube-white sharing button
Vijay-led TVK wins Tamil Nadu floor test as AIADMK split plays out | Congress veteran Sonia Gandhi admitted to Medanta Hospital in Gurugram | PM Modi halves convoy size after austerity call | Mulayam Singh's younger son Prateek Yadav dies at 38 | Protests erupt in Delhi after NEET UG 2026 cancellation over alleged paper leak | AIADMK cracks widen after Tamil Nadu defeat; faction backs Vijay-led TVK government | Himanta Biswa Sarma takes oath as Assam CM for second term after BJP’s landslide win | Bengali rights activist Garga Chatterjee arrested over alleged provocative remarks ahead of assembly polls | No return to full WFH yet: IT firms unlikely to change hybrid work model despite PM Modi’s appeal | Suvendu Adhikari Cabinet clears BSF land transfer, census rollout, Ayushman Bharat in Bengal
Coronavirus Vaccine | Delta Variant
Image Credit: Unsplash

Covid19 vaccine efficacy dropped as Delta variant arose : CDC

| @indiablooms | Aug 26, 2021, at 02:25 am

The effectiveness of coronavirus vaccines in frontline workers fell to 66 per cent after the Delta variant emerged compared to 91 per cent before it became dominant, according to a report from the US Centers for Disease Control and Prevention.

The CDC, however, warned that the findings of the study should be interpreted with caution as vaccine effectiveness might wane over time and the estimates of efficacy were approximate, according to a Bloomberg report.

“Although these interim findings suggest a moderate reduction in the effectiveness of Covid-19 vaccines in preventing infection, the sustained two-thirds reduction in infection risk underscores the continued importance and benefits of Covid-19 vaccination,” researchers wrote in the agency’s Morbidity and Mortality Weekly Report, according to Bloomberg.

The findings match the earlier claims made by Israel and UK that vaccines lose some potency over time, especially after the more virulent Delta variant emerged.

This and other results will be under examination next week as CDC advisers will weigh the Biden administration's decision to administer booster doses to people who have been fully vaccinated.

Support Our Journalism

We cannot do without you.. your contribution supports unbiased journalism

IBNS is not driven by any ism- not wokeism, not racism, not skewed secularism, not hyper right-wing or left liberal ideals, nor by any hardline religious beliefs or hyper nationalism. We want to serve you good old objective news, as they are. We do not judge or preach. We let people decide for themselves. We only try to present factual and well-sourced news.

Support objective journalism for a small contribution.