Unlike most multiplayer-games, the teams in Enemy Territory: Quake Wars don't just have a different skin but are actually completely asymmetrical balanced from classes over weapons to vehicles. This means that while both teams have a medic, they both function differently. The GDF medic for example behaves like every other medic by instant reviving his teammates but the Strogg technician needs a few seconds before his dead companion is alive again. To balance this out, the Strogg technician can turn dead GDF soldiers into spawn hosts. So if he dies, he respawns at such a host (if it hasn't been destroyed).