Like cigarette manufacturers decades ago, e-cigarette makers have pitched their products as fun and safe. But nobody knows what the risks are.

After past outbreaks, workers with proof of antibodies were in demand. But history urges caution.

Dr. Larry Brilliant, who helped eradicate smallpox, says past epidemics can teach us to fight coronavirus.

COVID-19 attacks the lungs. Past research shows that smoking and vaping may amplify the coronavirus.