We expect to go into the hospital to get better, not to become sicker. But sometimes hospital patients get infections that they didn't have before going to the hospital for treatment. And these infections could be costly.

HHV-6 is the common name for two viruses which nearly every human has had by their second birthday. Some people are born with a strain of HHV-6 virus that is inherited from a parent. This inherited HHV might offer a clue to chronic fatigue symptoms.

The foodborne parasite Cyclospora has been causing infections across the US this summer, leaving authorities searching for a culprit.

Vaccines protect people from diseases. Pregnant women who get vaccinated can pass on that protection to their developing babies. And it seems some of that protection may last even after birth.

The parasite Cyclospora has caused illnesses in multiple states across the US this summer, and officials are still investigating how it is spreading.

Ask some people to name the world's most dangerous diseases and they just may tick off several illnesses that dominate health news headlines. Hepatitis also should be on their radar, according to organizers of World Hepatitis Day.

Health officials celebrated when a safe and effective vaccine to protect against HPV (human papillomavirus) was made available to the public.  But a vaccine can't protect the public if it isn't being used.

It’s well known that the human papillomavirus (HPV) is linked to cervical cancer. The virus is also associated with other genital cancers, as well as anal cancer. But another cancer may be added to this list.

As if Lyme disease wasn't enough, people now have a brand new reason to keep tick bites at bay.

Though the Middle East respiratory syndrome coronavirus (MERS-CoV)  has now infected 90 patients and has been causing worries about a global spread for months, the worldwide threat may not be all that serious.