Emily Waltz If an emerging strain of SARS-CoV-2 evades the immunity already conferred by vaccines and infections, vaccine makers say they will act quickly to roll out new jabs. Credit: Chandan Khanna/AFP via Getty Pfizer’s chief executive, Albert Bourla, made a bold promise in June. Standing next to US President Joe Biden at a press...
Credit: Pixabay/CC0 Public Domain Vaccination is highly effective at preventing severe cases of COVID-19, even against the Delta variant, a vast study in France has shown. The research published Monday—focusing on prevention of severe COVID and death, not infection—looked at 22 million people over 50 and found those who had received jabs were 90 percent...
The Centers for Disease Control and Prevention (CDC) has been examining the real-world performance of the two vaccines since they were first authorized among health care personnel, first responders and other frontline workers. The effectiveness against infection of the Pfizer and Moderna COVID-19 vaccines dropped from 91 percent before the Delta variant became dominant to...
By Rich Haridy August 02, 2021 Currently, there are 11 coronavirus variants named after characters in the Greek alphabet [email protected]/Depositphotos In the space of a few months the Delta variant has become the dominant strain of SARS-CoV-2 around the world. But what comes after Delta, how are new variants being named, and what are “Variants...
