"Wide receiver Percy Harvin is missing practice time again, but it appears the Vikings can exhale.

Harvin has a stomach illness, not the migraine headaches that forced him out of three games and numerous practices the previous two seasons, coach Leslie Frazier said.

Harvin hasn't experienced a migraine since the 2010 season, he said recently. Frazier expects Harvin to return to practice today.

"We know there's a distinct difference, what's happening with your stomach and what's happening with migraines," Frazier said."