this is an interesting article about history of Waves of pandemics..most wont read it because it is too long..so you can always scroll to the conclusion
https://www.ncbi.nlm.nih.gov/books/NBK22148/
The Threat of Pandemic Influenza: Are We Ready? Workshop Summary.
“The idea that the next pandemic may not do all or even most of its damage in the first season is certainly good news for preparedness planning. In all three pandemics in the twentieth century, the majority of associated deaths occurred 6 months to a year after the pandemic virus first emerged. “
Thank you.
I will read it today.