The US's influenza mortality figures are a combined influenza and pneumonia figure because they usually don't even bother actually screening for influenza.
Research attempting to determine how much of that figure is infected with influenza have found figures like 1/3rd (though with large differences year to year).
nullc|5 years ago
Research attempting to determine how much of that figure is infected with influenza have found figures like 1/3rd (though with large differences year to year).