Viral Infections Directory
Viruses cause all types of infections and diseases. Some of the most common viral infections are the common cold, the flu, and warts. Some of the more severe diseases that viruses cause are HIV/AIDS, smallpox, and hemorrhagic fevers like Ebola and Marburg. In order for viruses to cause an infection, they must take their genetic material and hijack normal, living cells to produce more viruses with the same genetic material. Since viruses live inside cells of the body, they are hard to kill. But there are vaccines that can protect humans from many viral infections. Learn more about various viral infections and vaccines.
Bacterial vs. Viral Infections: Causes and Treatments
What’s the difference between a bacterial and viral infection? WebMD explains, and provides information on the causes and treatments for both.
WebMD explains yellow fever, a disease that is carried by mosquitos and can lead to liver failure and death.
Coronavirus (COVID-19) Overview
The coronavirus causing COVID-19 is a new (novel) strain called SARS-CoV-2. Most coronaviruses cause mild respiratory infections and flu-like symptoms, but severe cases can be fatal. Learn how to spot symptoms, risk factors, prevent spreading the disease, and find out what to do if you think you have it.
Side Effects of the Smallpox Vaccine
Learn more about the potential side effects of the smallpox vaccine.
Viral Hepatitis: Eight Ways to Protect Your Family
Hepatitis A and B can lead to liver damage and sometimes death. But you can protect yourself and your family with these eight steps.
Another West Nile Virus Summer?
Eyes are turning to California as encephalitis season starts.
The Ghost of Smallpox Past
Despite its being dead for 25 years, the specter of a smallpox pestilence -- via terrorism -- haunts the public.
Viral Hepatitis: 8 Self-Defense Tips for Travelers
The risk of contracting viral hepatitis is higher for many Americans who travel abroad -- especially to regions where hepatitis is prevalent and sanitation is poor. Here are 8 tips to protect travelers.
Slideshows & Images
Picture of Varicella-Zoster Virus Infection on Chest Wall
Varicella-zoster virus infection: herpes zoster in T8 to T10 dermatomes. Typical grouped vesicles and pustules with erythema and edema of three contiguous thoracic dermatomes on the posterior chest wall.
Picture of Hereditary Hemorrhagic Telangiectasia
Hereditary hemorrhagic telangiectasia. Punctuate hemorrhagic macules on the finger.
Picture of Varicella-Zoster Virus Infection
Varicella-zoster virus infection: varicella. Multiple, very pruritic, erythematous papules, vesicles (“dewdrops on a rose petal”), and crusted papules on erythematous, edematous bases on the face and neck of a young female. The spectrum of lesions, arising over 7 to 10 days, is typical of varicella.
Picture of Varicella-Zoster Virus Infection: Close-Up
Varicella-zoster virus infection: herpes zoster with cluster of grouped vesicles. Grouped and confluent vesicles surrounding erythema on the chest wall.