New research shows that tuberculosis likely spread from humans in Africa to seals and sea lions that brought the disease to South America and transmitted it to Native people there before Europeans landed on the continent.
West Africa is being ravaged by the largest ever outbreak of Ebola, a disease with a death rate of up to 90 percent. Arizona State University epidemiologist Gerardo Chowell-Puente offers his take on the situation.
Keeping kids healthy is Jason Gillette's business. As the director of School Health for the Arizona Department of Education, the Arizona State University alumnus is dedicated to creating and improving healthy school environments.