"Certain flu virus mutations may compensate for fitness costs of other mutations Certain flu virus..."

“Certain flu virus mutations may compensate for fitness costs of other mutations Certain flu virus mutations may compensate for fitness costs of other mutations”

- https://www.sciencedaily.com/releases/2018/01/180118142735.htm

source http://physiquesportsuk.tumblr.com/post/169892595704