Which statement considers how hereditary affects health

That is

Ithink it true i might be wrong so don't take my word that its true.

Habit 1: be proactive  habit 2: begin with the end in mind  habit 3: put first things first  habit 4: think win-win  habit 5: seek first to understand, then to be understood  habit 6: synergize  habit 7: sharpen the saw 

What happens to the influenza virus every 20-40 years and why?