> In fact, take a look at Brazil or India, places that are hot year round. They have very few instances of the flu no matter the time of year. This shows that it doesn't spread much in warm weather.
I would argue that it doesn't show that. Nobody is testing for Influenza if it's just a "mild" case. What is being tracked is deaths from pneumonia that are attributed to Influenza.
If you look at the mortality in India or Brazil, it's way lower than in countries further from the equator. You also would expect testing capacity to be lower, so there's likely more unknown cases there.
I would argue that it doesn't show that. Nobody is testing for Influenza if it's just a "mild" case. What is being tracked is deaths from pneumonia that are attributed to Influenza.
If you look at the mortality in India or Brazil, it's way lower than in countries further from the equator. You also would expect testing capacity to be lower, so there's likely more unknown cases there.