needed

Pfizer reported Wednesday that the power of its two-dose Covid vaccine wears off slightly over time, but it still offers lasting and robust protection against serious illness. The company suggested that a third vaccination could improve…

There's no need for Covid booster doses right now, the dean of Brown University's School of Public Health said Friday, as highly transmissible, new variants test the protections of the available vaccines."Let me tell you where we are: the…

Most power rests in the hands of states, employers, or private institutions.Dr. Ezekiel J. Emanuel, a professor of bioethics and health policy at the University of Pennsylvania, said the United States is unlikely to make significant…

Economic projections that predict the potential impacts of climate change have grossly underestimated reality and delayed global recovery efforts by decades, according to a senior professor.Mainstream economists "purposely and completely"…

BioNTech's chief medical officer told CNBC on Wednesday that people will likely need a third shot of its two-dose Covid-19 vaccine to lower immunity to the virus. This is in line with previous comments from Pfizer CEO Albert Bourla.Dr.…

The global scientific consensus is clear: emissions of gases that warm the planet must be cut by almost half by 2030 so that the world can ward off the worst climate catastrophes.The global political response so far has been…

According to Dr. Paul Offit, director of the Vaccine Education Center at Philadelphia Children's Hospital, the second dose of the Covid-19 vaccine is critical to creating longer and complete immunity as well as preventing variants of the…

Close-up of the Moderna vaccine at the Park County's Department of Health's COVID-19 Vaccination Clinic for Seniors 80+ on January 28, 2021 in Livingston, Montana.William Campbell | Getty ImagesSome health care providers have regularly…