the verdict is still very much out.
In a 2004 Lancet article looking at seasonality and SARS, Scott Dowell and Mei Shang Ho indicated the case wasn’t clear. They wrote: “It is true that most established respiratory pathogens of human beings recur in wintertime, but a new appreciation for the high burden of disease in tropical areas reinforces questions about explanations resting solely on cold air or low humidity.” They added, “newly emergent zoonotic disease such as Ebola or pandemic strains of influenza have occurred in unpredictable patterns.”
