Cases of West Nile virus have been steadily developing across the country this year, continuing even as fall approaches. This mosquito-spread disease has now caused infections in nearly every US state during 2013.

Cancer is generally a disease of an aging population. Cancer risks typically start to increase around the age of 50. But recent trends signal an alarming jump in a certain type of cancer among people under the age of 45.

Michigan is joining the ranks of other states reporting cases of measles discovered this year. The disease has been largely eradicated in the US, but it remains a problem abroad and still poses a threat to people without immunity.

One of the more disabling and fatal bacterial illnesses is meningitis. There are vaccines to protect against many meningitis strains, but not all of them — yet.

When a person develops a bacterial infection, healthcare workers usually provide antibiotics to help fight the infection. But some bacteria have adapted and can fight off the antibiotics.

Dengue fever might sound like a foreign concern for most Americans, but residents of Florida are learning that the tropical disease is not as far-removed as they might have thought.

Making the effort to protect yourself from mosquito bites might do much more than just prevent an annoying itch; it might also help prevent an illness experienced by hundreds of people across the US this summer.

Using antibiotics carefully and correctly has an impact far beyond the health of just one individual patient — a fact stressed in a new report from the Centers for Disease Control and Prevention (CDC).

Health officials in Louisiana are warning residents about a rare but serious threat — a dangerous ameba in the water supply.

Methicillin-resistant Staphylococcus aureus (MRSA) is a type of staph infection that doesn't respond to certain types of antibiotic medications, making it harder to treat. Though these infections pose a threat, especially in healthcare settings, prevention methods seem to be working.