Virologists have been working late since swine flu appeared in April. With flu running amok in South America, what can we expect when the epidemic returns north this fall?

The epidemic fades, with 61 confirmed deaths and 5,251 cases so far. Were the public health warnings overdone? Or did they help stem the pandemic? Your guide to the time of finger-pointing, flu-style.

This year’s influenza vaccine in the United States contains three strains of the influenza virus. Last March, experts at the U.S. Centers for Disease Control and Prevention (CDC) and the World Health Organization chose those strains based on the varieties of flu virus that were present at the end of North America’s flu season.
The decision [...]

Common influenza infects people around the world. What are the dangers of pandemic bird flu, and what can we do to avoid them? What are the roles of vaccines, international cooperation, and national governments?

Monkeypox, AIDS, SARS: Are more diseases jumping from animals to people, or is it just our imagination?