Up to level 3 +1/level to any HT roll to avoid unconsciousness – whether as a result of injury, drugs, or ultra-tech weapons – and to resist supernatural abilities that cause unconsciousness
Whenever you roll to recover lost HP or to see if you can get over a crippling injury, you get +5 to your effective HT. When you roll to recover lost HP, a successful HT roll means you heal 2 HP, not 1.