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: One: What is the illness like and, two, what causes it. Learn more.


What Is Walking Pneumonia? 

Walking pneumonia can cause mild symptoms but also have serious consequences. Learn what is walking pneumonia, treatment, and how to avoid the infection.


How Do You Get Cellulitis? 

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


What Is AIDS? 

In the late stage of an infection with the HIV virus, called AIDS (acquired immunodeficiency syndrome), your immune system cannot fight off infections normally.


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 everyone 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 sandpapery rash along with 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. Learn about the symptoms of food poisoning and how to avoid them to stay healthy.