More than 100 years have passed since the Spanish flu caused many deaths worldwide. Nor does it have much in common with the ongoing Covid-19 pandemic.
Historically, there have been events that almost caused humanity to be wiped out or severely affected.
Many people believe that mad cow disease, Ebola, Zika, even HIV and SARS originate from outside the universe.
The European population was halved by the plague, while the Spanish flu killed about 20 to 100 million people around the world earlier in the century.
A new super vaccine, which helps prevent all lifelong influenza viruses, can be officially used in the next 5 years, following initial successful trials.
Many people also believe that the Spanish flu will destroy mankind, complete what the war just ended has not done yet.