Can Terran Medivacs heal allied units?
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.