If I use the Anti-Bio Beam on my own crew members while boarding an enemy ship, will they take damage?
Does 60 damage to crew members of either ship.
From the FTL Wikia:
I think it is safe to assume your own crew will take damage while boarding. If you have drone bay feel free to go drone boarder crazy.
Tip: If you have anti-bio beam AND boarder drone put your boarder drone in a 2 by 2 room to get more enemy crew in one spot. Then hit that room with anti-bio beam and all 4 will be hit.