For those who are puzzled with the "reduce negative effect":
there are max and "true max"(Tmax) values for a normal stat like health and stamina.
You can increase Tmax of by getting CON trait, that is the maximum value when the character has no debuff.
while max value is something you get with Mod.
How it works: Tmax clamps the max value, so max <= Tmax
example: by getting body mods, max = 130, but Tmax = 120, so max => 120
but when you have a debuff, that reduce max valye by 5,
so max = clamp(130 - 5, Tmax) = 120, you still have you max value 120.
For me i prefer not getting any mods, dont like arousal boosting of body mod
TLDR: wound reduce less max health and stamina if you have body mod