Nigeria's latest and largest epidemic has claimed almost 100 lives. Find out more about the virus.
Hand, foot and mouth disease is a viral infection that can affect infants and young children.
Guinea has battled to contain an Ebola epidemic threatening neighbouring countries as fear and confusion grips its people.
Computer viruses now live up to their name: thanks to British researchers wi-fi networks can now infect each other just like a common cold works.
An advanced Spanish-speaking "threat actor" dubbed "The Mask" has been discovered to be behind global cyberespionage operations since at least 2007.