What We Can't Know About a Vaccine

New York City was hit hardest in the early months of the pandemic in the U.S. But after a strict lockdown, the city has enjoyed months of some of the lowest case rates in the country. But as schools reopen and the weather gets cooler, cases have begun to rise. The rate of positiv ...  Show more

President Donald Trump’s diagnosis of coronavirus has raised questions about everything from the Supreme Court nominating process to the possibility of future presidential debates. And of course, the unprecedented possibility of a candidate being removed from the ticket this late ...  Show more

A vaccine for Covid-19 could come faster than previous vaccines, but it could still be a year or more before one is widely available. CNN's Chief Medical Correspondent Dr. Sanjay Gupta talks to a clinical trial participant and explains why this vaccine search is breaking barriers ...  Show more

Researchers around the world are racing to develop a vaccine against Covid-19, with more than 170 candidate vaccines now in development. Most vaccines take years of testing and additional time to produce at scale, but scientists are hoping to develop a coronavirus vaccine at reco ...  Show more

The President is pushing for a Covid-19 vaccine before the election, but is that realistic? Or safe? CNN Chief Medical Correspondent Dr. Sanjay Gupta speaks with Moncef Slaoui, Chief Advisor of Operation Warp Speed, the U.S. government’s Covid-19 vaccine program. To learn more ab ...  Show more

Scientists are racing to make a vaccine for the coronavirus, collaborating across borders in what is usually a secretive and competitive field. But their cooperation has been complicated by national leaders trying to buy first claim on any breakthrough. Today, we explore how t ...