Meningitis Symptoms in Adults 

Meningitis is a potentially fatal infection. Meningitis symptoms in adults are often different than meningitis symptoms in children. Here's what you should know.


What Is Rotavirus? 

A highly contagious infection, rotavirus causes severe diarrhea and, in the past, killed up to 60 unvaccinated American children under age five each year.


What Is C. diff?  

When people ask, “What is C. diff?” — they are really asking two questions. The first is: "What is the illness like?" The second is: "What causes it?"


What Is Pneumonia? 

What is pneumonia? When air sacs in your lungs fill with fluid, you have pneumonia, usually a complication of the flu. Severe cases can be life-threatening.


How Do You Get Cellulitis? 

Cellulitis causes pain, blindness, and even death. How do you get cellulitis? Find out your risk, the symptoms, and how to treat this dangerous skin infection.


Are Sinus Infections Contagious?  

Sinus infections are contagious only if they are caused by a virus, rather than bacteria, fungi, allergies, or other causes. Here's what you should know.

Doctor examining patient's lymph nodes --- Image by © Kate Kunz/Corbis

Strep Throat in Adults 

Strep throat is common in kids, but strep throat in adults does occur — and it can be serious. Learn about symptoms, testing, and how to protect yourself.

What Is Scarlet Fever?  

Children who get a red rash and a fever may have scarlatina, a bacterial infection that can lead to rheumatic fever, kidney disease, ear infections, and pneumonia.


Food Poisoning Symptoms 

Foodborne illnesses affect millions of people every year. Here's what you should know about food poisoning symptoms and how to avoid them to stay healthy.