Bad News for Those Inoculated with Pfizer and Moderna Vaccines
The efficacy of anti-COVID-19 vaccines of Pfizer and Moderna companies has decreased from 91 to 66 percent since the Delta variant of the novel coronavirus that causes this infectious disease has become dominant in the United States. This brcame clear from data published by a Federal health agency, Frrance Press reported. The Centers for Disease Control and Prevention said that according to n extensive study that covered thousands of employees of hospitals and other medical facilities in six states, both vaccines had a 91 percent efficacy from December to April. However, when the Delta variant became dominant (that is, its share of cases exceeded 50 percent), efficacy dropped to 66 percent, BTA said. However, the authors of the study make a caveat that the reason for this may be not only the spread of the Delta variant, but also the weakening of Pfizer and Moderna vaccines protection over time.
Several other studies have also found lower vaccines efficacy against the Delta variant, though they quoted different figures, AFP notes.
The U.S. Centers for Disease Control and Prevention stressed that vaccines still provide a high level of protection against severe course ofinfection and the need for hospitalization.
We need your support so Novinite.com can keep delivering news and information about Bulgaria! Thank you!
- » Bulgaria Ranks Sixth among Ten Poorest Countries in Europe
- » Protests against Green Certificate across Bulgaria Today
- » Bulgaria: Over 80% Drop in Restaurant Turnover after Introduction of Green Certificate
- » In September, the Growth of Foreign Tourists in Bulgaria was Nearly 40% for the Year
- » Are Employers in Bulgaria Required to Pay COVID Tests for their Employees?
- » Jeff Bezos wants to Build a Private Space Station