Here are some of the basics of the background of the flu virus, different strains/substrains, etc. This provides a better, more thorough understanding before reading about the new study
https://www.cdc.gov/flu/about/viruses/types.htm
Here are some of the basics of the background of the flu virus, different strains/substrains, etc. This provides a better, more thorough understanding before reading about the new study
https://www.cdc.gov/flu/about/viruses/types.htm