Global Health Question

I will be providing 2/4 sources needed below, tutor may choose any other 2 articles on that specific strain of influenza.

https://www.sinobiological.com/research/virus/1957-influenza-pandemic-asian-flu#:~:text=The%20Asian%20flu%20results%20in,weakness%2C%20and%20loss%20of%20appetite.

https://www.cdc.gov/flu/about/disease/spread.htm#:~:text=People%20with%20flu%20can%20spread,be%20inhaled%20into%20the%20lungs.