3.3K views · 43 reactions | Most experts say that the best, safest way to reach herd immunity is through a vaccine, and a more controversial way is through natural infection. WebMD Chief Medical Officer Dr. John Whyte explains how many Americans would have to be infected with, and recover from, COVID-19 for the U.S. to reach it: | WebMD | Facebook

Whatever you do, don't put your cast-iron skillet in a dishwasher. | WebMD

Sad and surprising celebrity diagnoses and concerning disease outbreaks were among the reasons you turned to WebMD for information this year. Here are the most-searched topics in 2015. | WebMD