New methods that test urine or nasal tissue samples appear promising: studies

But it's too soon to recommend supplements, dietary changes for prevention

Researchers see need to redirect positive emotions

But it's too soon to recommend supplements, dietary changes for prevention

Researchers see need to redirect positive emotions

Family members are frequently the culprits, researchers say

Virus doesn't transmit easily and medical care in United States is greatly superior to that in West Africa

Study found mental health sessions allowed patients to manage blood sugar levels more effectively

Taking low-dose pill each day fights numerous malignancies, and benefits outweigh any risk

Experts say finding shows how hard it is to quit, and that doctors need to make better effort to help