Many people ask themselves how effective the flu vaccines are.
The studies reports that 59% effectiveness in health the flu shot are.
The elder people have less effectiveness then the young people, scientists from
the University of Minnesota Center for Infectious Disease Research and Policy say they have a gap of information( we wonder what would be that gap).
As for the young children, they cannot determine exactly as there is not too many studies made for the flu shots( not too many experiments made).
If you wish to read more about the flu shot controversy you can go here: