Review
Polio Pioneer
Remembering HSPH Professor and Nobel Laureate Thomas Weller
What can we learn from vaccines?
Avian Flu: Preparing for a Pandemic
Scientists cannot predict whether or when a mutation might occur in the H5N1 bird flu strain--or in any of 20 other avian influenza strains--that would enable it to be transmitted readily to and between humans. Developing an effective vaccine and the capacity to manufacture it in sufficient quantities must form the centerpiece of pandemic preparations.
image: Getty Images-Photodisc