What movie was it where there a blue colored cop and he like blood cell or something to keep the guy inside of safe. I think Disney movie. first answer gets best?
You're thinking of
"Osmosis Jones" (2001), a Disney film where
Ozzy, a white blood cell, is tasked with protecting
Frank from a dangerous virus.
Ozzy is actually green, not blue, but he's definitely a cop-like character fighting for the health of his host!