MrEricSir writes: "A correlation between illness and cold weather is nothing new but this one is very specific: La Nina changes the migratory patterns of birds which can (and often does, according to this theory) cause flu pandemics." Link to Original Source
The rule on staying alive as a forecaster is to give 'em a number or
give 'em a date, but never give 'em both at once.
-- Jane Bryant Quinn