Visiting a clinic, Ecuador, 2005
Scientists have discovered a great deal about the causes of illness and ways to prevent disease. Yet these achievements have also been accompanied by challenges. We do not know every answer, and expensive drugs and effective vaccines are not always available to the people who need them most.
Teams around the world are tackling every angle of the issues we face. By studying past successes as well as failures, they are finding new ways for science to serve society.