May 23, 2013 — The virus's ability to move between these mammals might not bode well for humans. So far, it appears that H7N9 doesn't pass easily between people, but it could mutate over time and pose more of a threat.
May 22, 2013 — A handful of polio infections in Kenya and Somalia could set back efforts to wipe out the virus worldwide, health workers warned Wednesday. The last time there was polio in this region, the virus spread throughout the Horn of Africa into the Middle East and eventually into Indonesia.
May 22, 2013 — While studying microorganisms on humans is not new, tracking fungi is. In a census of sorts, scientists checked the skin of healthy volunteers. They found an expansive ecosystem of silent inhabitants.
May 22, 2013 — A measles epidemic in Wales that has infected more than 1,000 people is the fallout from a fraudulent paper linking the vaccine and autism published almost 15 years ago, health officials say. Many of the children and teenagers sick with measles were never vaccinated.
May 16, 2013 — Most public swimming pools are contaminated with germs carried by poop, federal researchers found. We swimmers are to blame. Showering before swimming and taking kids to the bathroom often would help.
May 9, 2013 — Infecting mosquitoes with a specific type of bacteria makes the insects resistant to malaria. Now scientists have figured out how to get the mosquitoes to pass the infections on to their offspring. If it can done reliably, it might help interrupt transmission of malaria to humans.
May 7, 2013 — With the new H7N9 virus spreading through China and H5N1 popping up every now and then in Southeast Asia, it's tough to keep track of all the flu viruses. Here's a quick guide to what those H's and N's mean, and why viruses with these letters cause the most concern.
Apr 30, 2013 — Teenagers and adults as old as 65 should get screened for HIV, new guidelines say. People at higher risk of infection, including men who have sex with men and people who use IV drugs, should get retested at least once a year.
Apr 12, 2013 — Infections with a new flu strain have increased, with three to five cases reported daily. The virus, carried by birds, doesn't appear to spread between people. Still, health officials in the U.S. are preparing to screen travelers and develop a vaccine.
Apr 5, 2013 — Sixteen cases of a new flu in China have touched off a major effort to determine what kind of threat it might be. Flu experts want to know where the H7N9 virus is coming from and how it gets around.