Harvin missed practice on Thursday because of an illness. But Harvin and the Vikings said it was not related to migraine headaches that have caused him to miss time in the past.
"Man, it was a stomachache," Harvin said after practice on Friday, quickly brushing aside any concerns about a migraine resurfacing. "I'm fine, fine, fine."
Harvin has played in just over 50 percent of the snaps through the first two weeks, and offensive coordinator Bill Musgrave said they'd like to get him more action against the Lions (2-0) on Sunday.
Coach Leslie Frazier said Harvin looked ready in his return to practice Friday and doesn't expect there to be any limitations during the game.
"I thought he looked pretty good," Frazier said. "He went through everything in practice, moved around pretty good and should be fine for Sunday."
"When we looked at our division, that was one of the things that we looked at, trying to match up at times," Frazier said of drafting Cook in the second round last year. "Having two big corners with Cedric (Griffin) and Chris, we thought that would help us. This is one of those games where we want it to pay off."
Linebacker E.J. Henderson (knee) was the only other player limited in practice Friday, but Frazier expects him to be on the field against the Lions, who are favored in a visit to Minnesota (0-2) for the first time since 1981.
The Vikings also are getting defensive tackle Kevin Williams back from a two-game suspension. Williams is dealing with a painful case of plantar fasciitis in his left foot that he said he expects to be an issue all season long. But Frazier said Williams looked good in practice this week and the coach is more concerned with his conditioning than the pain in his foot.
"That's something we'll have to help him with from a rep standpoint and monitoring his reps," Frazier said. "As far as moving around, he's moving around pretty good. The conditioning will probably be a thing that we will have to look out for."