A head cold, or common cold, is a viral infection of the nose and throat. It is usually a mild illness, and involves symptoms in the head, such as a stuffed, runny nose and watery eyes. According ...

Background: Accurate estimation of the case-fatality (CF) rate, or the proportion of cases that die, is central to pandemic planning. While estimates of CF rates for past influenza pandemics have ...

South Africa is grappling with a resurgence of the H5N1 bird flu, following outbreaks on poultry farms in Tswaing and Mkhondo ...