What Causes a Cold Sore? Factors can include injury or stress.
What Causes a Chronic Cough. Continue.
Recognizing Lung Disease. Continue.
Considering the Nasal Spray Flu Vaccine? Some people shouldn't get it, experts say.
Seasonal Flu Vaccine Fast Facts. Continue.
Do You Have Long COVID? Depends Whom You Ask, Study Says
Summer COVID Surge Continues as Wastewater Levels Rise, CDC Says
Tamiflu Safe For Children, Study Concludes
Flu-Linked Brain Swelling Is Rare in Kids, But It Can Be Fatal
COVID Vaccines Saved More Than 2.5 Million Lives, Mostly Seniors
Vitamin D Might Offer Protection Against COVID-19
