Good find. Synergistic with these possible contributors? Solar flares, the rollout of electricity and radar also. 5G now?

"It includes a very challenging & controversial section that suggests that influenza outbreaks re triggered by solar storms (hence the original ‘influenza’ name) & now also by environmental, RF exposure changes. This accounts for outbreaks occurring almost simultaneously around the world. The claim is that apparently almost all of us have dormant influenza virus inside us and it is triggered by external environmental signals."

https://www.cellphonetaskforce.org/review