Can Terran Medivacs heal allied units? Can they heal Zerg units or Protoss units aside from themselves?
Terran Medivacs can heal any allied biological units. The restrictions to Medivac's Heal ability are:
- Must be Biological.
- Must not be a structure. (Queen's transfuse skips this restriction)
- Must not be an enemy unit. (You can get around this with Neural Parasite)
Additionally you can repair allied mechanical units(/structures) with SCV's or mules. I.E. Collosi, Carriers, Stalkers etc. (Protoss structures are not mechanical :( )
Yes, Terran Medivacs can heal all types of biological units. This includes all Zerg Units and Zealots from the Protoss army.