Marburg

SARS

Polio

Mad Cow

Bird Flu

HIV

Virulent TB in South Africa May Imperil Millions

Mothers of Nepal Attack Measles

Mumps Epidemic Spreads; More Vaccine Promised

Study Finds Spread of Resistant Staph

In Florida, Petting Zoos Close Amid New Reports of Infections

New Strain of Flu Virus to Be Added to Vaccine

Around the Globe, Drug-Resistant TB Is Rampant

New Microbes Could Become the 'New Norm'

Marburg Vaccine Effective on Infected Monkeys

Marburg Outbreak Puzzles Scientists

A Daunting Search: Tracking a Deadly Virus in Angola

Stalking a Deadly Virus, Battling a Town's Fears

audio report

Specialists Say 'Healers' in Angola Are Helping to Spread Deadly Virus

Marburg as Bad as They Get

Rumor, Fear and Fatigue Hinder Final Push to End Polio

Polio Back in Yemen After 6-Year Absence

African Strain of Polio Virus Hits Indonesia

New Spread of Polio

Polio in Ivory Coast Started in Nigeria, Tests Confirm

Polio ressurgence in Africa, new round of vaccinations

50th Anniversary of Polio Vaccine

Official Tells of Investigation Into Mad Cow Discrepancies

Plan for Sharp Rise in Mad Cow Testing Gets Mixed Reaction

Research in Italy Turns Up a New Form of Mad Cow Disease

Mad Cow Quandary: Making Animal Feed

Ban Urged on All Animal Protein for Cattle

Human Brains Examined for Clues About Mad Cow

Blood Transfusion Suspected in New Mad Cow Case in Britain

Scientists Warn That Bird-Flu Virus Remains a Threat

From Two Mutations, an Important Clue About the Spanish Flu

Bird flu mutation sparks concern

Recent Spread of Bird Flu Confounds Experts

Bird Flu Fears and New Rules Rattle German Pet Lovers

Europe Takes Action as Bird Flu Spreads

Bird Flu Spreads to European Union for First Time

Nigeria Has Africa's First Case of Bird Flu

India Declares Arrival of Avian Flu Where 50,000 Birds Died

Health Experts Surprised at Rapid Spread of Bird Flu

When Influenza Takes Flight

A Medical Mystery Man Bounces Back From Avian Flu

A Vaccine for Humans Clears a Hurdle as Bird Flu Expands

Experts Urge Bird Vaccination Against Flu

Human Spread, a First, Is Suspected in Bird Flu in Vietnam

As Bird Flu Spreads, Global Health Weaknesses Are Exposed

China Killing Birds

Spread of Flu Across Asia Laid to Birds That Migrate

Avian Flu Said to Be Resistant to a Main Flu-Fighting Drug

Governments Across Southeast Asia Work to Contain Bird Flu

Treat herpes, treat HIV?
Drugs that target common infection might limit spread of AIDS virus

Rare and Aggressive H.I.V. Reported in New York

Gays Debate Radical Steps to Curb Unsafe Sex

How to Get Those at Risk to Avoid Risky Sex?