A pandemic (frae Greek πᾶν pan "aw" and δῆμος demos "fowk") is an epidemic o infectious disease that haes spread throu human populations athort a lairge region; for instance multiple continents, or even warldwide. A widespread endemic disease that is stable in terms o hou mony fowk are gettin sick frae it isna a pandemic. Further, flu pandemics generally exclude recurrences o saisonal flu. Throuoot history, thare hae been a nummer o pandemics, such as smawpox an tuberculosis. Ane o the maist devastatin pandemics wis the Black Daith, killin ower 75 million fowk in 1350. The maist recent pandemics include the HIV pandemic as well as the 1918 an 2009 H1N1 pandemics.