Interesting question. According to the CDC, in the week before Christmas, there were 36,852 deaths in the US. Of these, 211 were diagnosed simply as flu, and 2,379 were diagnosed as pneumonia — generally induced by flu. Taken together, that’s 2,590 deaths mostly among those age and older, but not exclusively so. Basically, that’s the flu accounting for 7% of all deaths in the US in that week.
Is that serious?
And the numbers seem to be still trending up. The peaks over the last couple of years seem to be getting later in the winter.