As if the West Nile virus wasn't enough of a reason to try to stay away from mosquitoes, residents of California now have a new reason to avoid these bug bites. State officials have discovered a type of mosquito known to carry other, sometimes serious, diseases.

Urinary tract infections are often painful, bothersome, and if you visit a hospital for treatment, expensive. A new study shows which people may be more likely to be treated in an emergency room or hospital for these infections.

People with asthma tend to have a higher risk of developing breathing-related infections. But it seems asthma also may be associated with other types of bacterial infections.

Babies born earlier than their due dates can often be at higher risk for certain diseases. With a usually weaker immune system, they may benefit from protective measures.

Reliable and consistent care for HIV-infected people is a necessity. Using multiple care centers for treatment may not allow patients to get the right amount or kind of care.

Hepatitis, or inflammation of the liver, is often caused by infection with one of the hepatitis viruses. But reports are surfacing of a non-viral form of the disease with connections to a dietary supplement.

One of the only vaccines that is known to prevent some forms of cancer is the HPV vaccine. Those who might worry about its safety have no reason to fear.

Although medical-grade honey has previously shown promising antibiotic properties, it may not live up to the hype for certain infections.

Medications originally created to lower cholesterol have been considered for use in treating a variety of other conditions. However, the authors of a new study say that a certain type of pneumonia may not be one such condition.

Malaria is an international problem and, as of yet, no successful vaccine for this mosquito-borne illness has been developed. Preliminary results for a new vaccine show that the situation might be changing.