Since human migrations began, germs have traveled with people, animals and traded goods. In an interconnected and mobile world, diseases such as HIV/AIDS and SARS can spread rapidly. Yet international cooperation through agencies such as the World Health Organization also allows for a collective response to global health threats and faster response times. Nations have developed diverse health care systems, aiming for cost-effective treatment. Yet the diverse systems contribute to disparities in global health, including availability of technology, pharmaceutical companies targeting innovations to maximize profits, and providers abandoning areas of need for higher salaries in the West, just to name a few.

AIDS: Facing the Second Wave

India's methods of combating the disease could provide examples – positive, as well as negative – for developing countries
Pramit Mitra
January 20, 2005

Indian Doctors Help Fill US Health Care Needs

But tougher visa requirements and discrimination may exacerbate the looming US healthcare crisis
Steve Raymer
February 16, 2004

Your Soap and Toothpaste Could Be Messing With Your Microbiome

Researchers question if common chemicals in soaps contribute to antibacterial resistance
Alison Moodie
August 3, 2016

Fighting the Zika Virus

India must prepare to control mosquitoes before the Olympics set for Brazil this summer
Nayan Chanda
February 17, 2016

Can We Stop Mosquitoes From Infecting the World?

Much is unknown about Zika, and quick fixes may cause more problems
Cheryl Katz
February 15, 2016

Short Answers to Hard Questions About Zika Virus

Research has linked the virus to birth defects in infants, Guillain-Barrê syndrome in adults
Donald G. McNeil Jr, Catherine Saint Louis and Nicholas St. Fleur
February 2, 2016

WHO: Extremely Alarmed by Zika, Could Reach 4 Million Cases

Brazil reports almost 4,000 cases of microcephaly
Tom Miles, Stephanie Nebehay and Kate Kelland
January 28, 2016