Medivac dropship

The medivac dropship (or medical evacuation dropship) is a terran aerospace transport that also provides medical support for wounded troops. They first appear in StarCraft II.

Game Unit
The dropship picks up and dorps units very quickly.

There is a delay between every dropped unit. Transports have a drop animation which doesn't affect gameplay, although it will be more vulnerable as it will not automatically move away if attacked.

The medivac have a similar transport capacity to the StarCraft I dropship.

Against the zerg, medivacs work well with marauders as part of a "commando force."

Healing
The medivac dropship automatically heals infantry units below it with a visible animation, likely in the form of floating nanites. The speed at which it heals is currently subject to balancing. The medivac dropship currently heals much faster than Brood War medics, about twice as quickly.

The healing ability only works on one unit at a time, and medivac dropships cannot "combine" their healing on one target unit.

The beam can target any zerg unit, including air units. The ability does not "stack" with a roach's fast healing rate.

Medivac dropships cannot heal units inside of them.

Strategies
Medivac dropships make great support to marines, especially those bolstered by ballistic alloy combat shields, which enables them to survive a hit from a high damage unit, after which they can be quickly healed.

Medivac dropships can support raiding very effectively. They can heal a cloaked ghost as it drops nukes.

Development
The medivac dropship was designed to replace medics. Medics could not keep up with reapers, which discouraged the latter's use in favor of the medic/marine combination. The medivac dropship allowed for more flexibility.