Twenty years ago, when AIDS was devastating communities in sub-Saharan Africa, Columbia's Wafaa El-Sadr created an organization to save lives in some of the continent’s hardest-hit countries.
Scientists from Columbia University’s Center for Radiological Research have shown that a narrow wavelength of ultraviolet light safely killed drug-resistant MRSA bacteria in mice, suggesting its potential to reduce surgical site infections.
Scientists at the Mailman School of Public Health have discovered a new virus in seals that is the closest known relative of the human hepatitis A virus.