Harvin, Peterson, Henderson all active

The Vikings will have their injury concerns from this week all active, including Percy Harvin, who missed time this week with migraine headaches.

They may not be 100 percent, but the Vikings' main injury and health concerns are all active today for the 49ers game.

Percy Harvin is active despite missing Thursday and Friday's practices with migraine headaches. LB E.J. Henderson (shoulder) and RB Adrian Peterson (back) are both active after suffering injuries in the first two weeks and missing practice time. Also active is safety Madieu Williams (shoulder), who was limited for parts of this week as well.

Inactive for the Vikings are Sage Rosenfels (third QB), WR Jaymar Johnson, CB Asher Allen, safety Husain Abdullah, LB Erin Henderson, C Kory Lichtensteiger, DT Jimmy Kennedy and DL Jayme Mitchell.

For the 49ers, Nate Davis (third QB), CB Marcus Hudson, S Curtis Taylor, LB Marques Harris, C Cody Wallace, WR Brandon Jones, WR Jason Hill, DT Ricky Jean Francois.

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