I do not think so because
The grunts wear breathing support (if you killed a grunt and melee him in the big con thing you see blue air coming out.) So they can't breathe oxygen
and the flood gos in the mouth and the grunts have something in there mouth.
so they are very lucky they can't be flood.
-blue team guy.
THE halo games that have the flood are halo combat evolved,halo 2,halo 3 and halo wars
yes they do
halo 1,2,and 3
You can't create AI in Halo 3.
you can't
Yes Of Course I Played Halo 3
no, all there is not any flood in halo 3 odst firefight
In halo 3 yes but I'm not sure about halo 1
you cant
Halo 3: ODST and Halo Reach
Sadly no, the creators of Halo 3 felt that if you had hunters and grunts as allies(the ones that sided with the Elites) and enemies(the ones that sided with the Prophets and Brutes) it would confuse the player. But some still stayed sided with the Elites, but you just don't see them in Halo 3, you see them in Halo 2 during the Covenant Civil War.
you cant its impossible