What Herd Immunity Really Means

Black Americans have an increased vulnerability to Covid. Many explanations have been floated for that: Black people are more likely to have chronic illnesses such as diabetes and high blood pressure; many work in frontline jobs. But Cynthia Koons reports that scientists are incr ...  Show more

Robinhood has become one of the Covid economy’s breakout successes. Americans marooned at home binge-watched Netflix shows, went shopping on Amazon Prime, and discovered day trading on their mobile phones. “Robinhood traders” became the shorthand explanation for the frenzy of oft ...  Show more

Several vaccine companies have announced promising early evidence that their vaccines are effective at preventing symptoms of a coronavirus infection. So what comes next? CNN Chief Medical Correspondent Dr. Sanjay Gupta talks to vaccine creator and virology and immunology expert, ...  Show more

Long Covid can ruin lives, and scientists are striving to understand the condition and beginning to get some early clues about possible treatments. While there are still more questions than answers, though, many have turned online for help. But could what they find there sometime ...  Show more

Earlier this spring, doctors around the country began to worry that fear of Covid-19 was keeping their patients away. Now, we’re starting to see the consequences of that. Today, CNN’s Chief Medical Correspondent Dr. Sanjay Gupta talks to Dr. Michelle Kittleson, a cardiologist in ...  Show more

Everybody hopes that the new super-charged Omicron variant of coronavirus will be less severe, but even if it is, it’s spreading so fast and infecting so many people, health services around the world could still buckle under the strain.Two years into the pandemic, Claudia Hammond ...  Show more