Shapeshifter Stuff, A few questions Options

[ElFenrir]

Ok, so I finally decided to make up the idea I had for an elven bear shapeshifter mystic adept, Druidic tradition, and I have a few questions regarding their allergy/vulnerability to silver.

If I recall, Vulnerability means that the weapon harms them as a normal weapon would harm a normal person-i.e., this damage cannot be regenerated through their Regeneration power, but must be healed normally? I paged through RC a few times and I can't seem to find this.

Ok, so the Allergy. Now, a Shapeshifter's allergy to Silver would essentially be the same thing as a Human with severe allergy to silver-ie, contact with skin causes pain, +4 DV to weapons used. Does Alleviate Allergy help a Shapeshifter? If he cast it on himself and sustained it in a combat with someone wielding, say, a silver knife, and got enough hits to knock it to Mild, would it be treated as Mild for the duration of the spell? Or does this spell not work on things with an inate allergy(like vampires to wood?)

Now, as for the damage. What about damage and armor? Say a human takes a stab at him with a silver knife. Average dude, say strength 3. Normal knife damage would be 3P, but it would be 7P vs. my shifter, since he's got the Allergy. But...he's wearing Impact Armor(Armor Jacket 8/6, with Mystic Armor 1, and 1/3 worth of PPP with FFBA2), for a final impact armor of 11. If the human manages to hit, but only does 1 net hit, it has an effective DV of 4 to a human-8 to my guy...but it's not enough to penetrate his armor, and the damage is still Stun. Even if the knife had a point of AP, it would still be Stun. Does he take the extra Stun damage from the attack(tries to knock down (8 stun, basically, with his armor + body roll), or does the silver actually have to contact his skin for the extra damage to kick in, and thus he'd only be rolling against the base knife damage? I know severe allergies are severe, but I don't know if, say, thwacking a silver stick against his armor jacket would cause him a Severe reaction. It might, but it doesn't say ''being anywhere near'' the allergen, but in the BBB, it does say ''contact.''

I think that's all for now. I recall that a metahuman shifter keeps things like vision or whatnot, but doesn't stack the stat abilities, so I'm ok there.