How many pandemics have there been between 1900 and today?

@myrith (1830)
Canada
October 27, 2009 9:32pm CST
Does anyone know the right answer to this question? I have to do this training program online for work purposes, and there are many questions that I might ask of you later,including this one! so please bear with and help me out if you can. Thanks all:)
No responses