The effects of Tamiflu and Relenza in young children under 12 have proven to be uneffective. All it seems to do is delaying the swine flu symptoms by 1 day, so the child can go to school and infect other children. The swine flu antiviral medication is only effective in 8% of the swine flu cases; if you want to cure a swine flu case of a child 12, you would have to supply the swine flu antiviral to up to 13 children.