Meningitis is a relatively rare infection that affects the delicate membranes -- called meninges (men-in'-jeez) -- that cover the brain and spinal cord. Bacterial meningitis can be deadly and contagious among people in close contact. Viral meningitis tends to be less severe and most people recover completely without specific therapy. Fungal meningitis is a rare form of meningitis and generally occurs only in people with weakened immune systems.
The Black Death is thought to have originated in the arid plains of Central Asia, where it then travelled along the Silk Road, reaching Crimea by 1343. From there, it was most likely carried by Oriental rat fleas living on the black rats that were regular passengers on merchant ships.
By the mid-fourteenth century, only the rich could afford to bathe during the cold Winter months, and most of the population was dirty most of the time, even if they did not enjoy being so. The Black Death seems to have arisen somewhere in Asia and was brought to Europe from the Genoese trading station of Kaffa in the Crimea (in the Black Sea). The story goes that the Mongols were besieging Kaffa when a sickness broke out among their forces and compelled them to abandon the siege.