Researchers at New York University Hospital worry the mice they use to study human disease may have perished in the flooding caused by Superstorm Sandy. iStockphoto.com hide caption

itoggle caption iStockphoto.com

Two boys study together at a Chicago yeshiva in 2009. Public health officials say this type of close physical contact caused a mumps outbreak to spread throughout several orthodox Jewish communities in and around New York City. M. Spencer Green/AP hide caption

itoggle caption M. Spencer Green/AP

Dr. Esther Dalizu holds a pack of Coartem Malaria drugs in a pharmacy in Nairobi, Kenya, last year. Sayyid Azim/AP hide caption

itoggle caption Sayyid Azim/AP

Students at Georgetown University School of Medicine prepare to meet with an actor playing a patient in an exam room in March. Kevin Wolf/AP hide caption

itoggle caption Kevin Wolf/AP

In Washington's Columbia Heights neighborhood, Claire Robertson, a grad student, talks with Scott Hensley about retail health clinics. David Schultz/NPR hide caption

itoggle caption David Schultz/NPR

Radiation therapist Jean Etienne holds a range compensator, which shapes the depth to which the proton beam enters a patient's body to target a tumor. Rebecca Davis/NPR hide caption

itoggle caption Rebecca Davis/NPR

A Framingham police officer keeps watch as federal agents search the New England Compounding Center company in Framingham, Mass., on October 16. Dominick Reuter/Reuters /Landov hide caption

itoggle caption Dominick Reuter/Reuters /Landov

An image of researchers at Oregon Health & Science University removing the nucleus from the mother's cell before it's inserted into the donor's egg cell. Courtesty of Oregon Health & Science University hide caption

itoggle caption Courtesty of Oregon Health & Science University

Human embryos under a microscope at an IVF clinic in La Jolla, Calif. Sandy Huffaker/Getty Images hide caption

itoggle caption Sandy Huffaker/Getty Images

Under the microscope, Mycobacterium tuberculosis bacteria. The germs that cause TB have become resistant to many drugs. Janice Haney Carr/CDC hide caption

itoggle caption Janice Haney Carr/CDC