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          @MLevitt_NP2013 2/ If you look at the R15(-64) group a quarter of the way up you see the large 2020 increase in US
      
        https://twitter.com/BaizuoBu/status/1332435697676865536
        https://twitter.com/BaizuoBu/status/1330292510221012995@geenlid @interpolated 2/ The first step is population adjustment. This becomes clear when you look at US historical mortality records and find some years they report death counts and some years death rates!
        
          2/  Note that everything on the chart has been population adjusted onto the US scale so the compares with the US 2018 ILI "yellow zone" are valid.
      
        
          First here's the new mode calculating 2018 (a "bad" flu year).  Read the newly added blue text with calculations in the lower right.
      
        
          2/  While there isn't great detailed mortality data on the 1918 pandemic -- and there are some interesting questions like how many died of *recommended* aspirin overdoses! -- there is US monthly data on the more recent 1957 and 1968 pandemics.https://twitter.com/LetsStopTheLies/status/1287599326336868353