What do you know about H1N1 pandemic?

The H1N1 pandemic (also known as swine flu) was an international outbreak of a strand of influenza that mutated and allowed for humans to recieve the virus. Scientists have traced the origins of the outbreak to a small pig farm in central Mexico where it quickly passed to the United States and then the world. This is a biological pain since it deals with a virus and infecting humanity with an actual sickness, based on this I would rate the pain scale a 9 out of 10 since it least to tens of thousands of deaths worldwide and dominated media coverage for the entire year. #bio https://www.bmj.com/content/339/bmj.b2840.short