What Causes a Cold Sore? Factors can include injury or stress.
Mouth Piercings Can Be Dangerous. Here's what could happen.
Diagnosing Pneumonia. Continue.
Need a Lung Function Test? Here's what it may reveal.
Identifying Signs of the Common Cold. Here are typical symptoms.
Trump Administration Reverses Plan to End Free COVID Test Program
Flu and Stomach Bugs Are Spreading Fast—Are You Prepared?
STI Testing at Home? Survey Finds Many Young People Are For It
Severe Infections Double Risk of Heart Failure
Americans Still Consider COVID Major Public Health Threat
COVID-19 Remains Major Health Threat in U.S.