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Pfizer and BioNTech announced Thursday that they are developing a Covid-19 booster vaccine that will target the Delta variant amid concerns about the highly communicable strain that is already the predominant form of the disease in the…

The highly transmissible Delta variant is now the dominant strain of coronavirus in the United States, outperforming the alpha variant, according to Covid-19 modeling data released by the Centers for Disease Control and Prevention.Delta,…

Approving a second vaccine for teenagers could help convince more parents, some of whom have expressed reluctance to vaccinate their children, that the shots are safe, experts say. "Most parents vaccinate their children," said Dr. O'Leary.…

The second new study, published in The Lancet, was carried out by researchers from the Israel Ministry of Health and Pfizer. It is based on more than 230,000 coronavirus infections that occurred in Israel between January 24th and April…

Robert Herjavec, Shark Tank co-host and founder of Herjavec Group, said the pandemic year had confirmed a fundamental lesson about speed as a key to success: small business owners need to act fast and make tough decisions to survive.The…

Dr. Anthony Fauci, director of the National Institute for Allergies and Infectious Diseases, speaks during a press conference at the White House in the James Brady Press Briefing Room of the White House on January 21, 2021 in Washington,…

A health worker wearing a protective mask works in a laboratory during clinical trials for a Covid-19 vaccine at the Research Centers of America in Hollywood, Florida, USAEva Marie Uzcategui | Bloomberg | Getty ImagesIt's been a little…

However, in the early days of the Moderna study, there were fewer cases of Covid-19 among study participants, making it more difficult to measure the differences between the vaccinated group and the placebo group. In either case, health…