Using this command...
this addEventHandler ["HandleDamage",{if (_this select 1=="") then {damage (_this select 0)+((_this select 2)/1000)}}]
...On Infantry:
This command should increase soldier's vitality 1000x. But still the soldier gets killed on few hits if fired repeatedly into one body part.
...On Vehicle:
"/" Doesn't work on vehicles.
"*" Causes any vehicle to be destroyed on few hits