QUOTE (Yerameyahu @ Apr 26 2011, 05:58 AM)

Yeah, based on the description, we have to assume that "Vector: Contact, Assensing" means both at once, not one or the other. Even magical viruses are still *viruses*, and you can't get one without physical contact. That's why MADS only affects *Dual-Natured*; a projecting mage can't get it, no matter what he assenses (*sees*) or touches. You can't get it just through seeing.
I'll give you guys the "dual natured only" since I was just trying to make my method easier by saying that MADS is a development of ADS, and thus wouldn't reduce its target audience to only dual natured being (I was effectively claiming it was errata, and so I apologize).
However, the commas after vectors are OR operators, not AND. That's why you get things like these:
- Gamma-Anthrax (Bacillus anthracis strain gamma)
Vector: Contact, Inhalation, Ingestion - Croisade (Visceral Ipsvorosis)
Vector: Inhalation
You can't contact, inhale, and ingest something at the same time.
Also, if you count inhalation as contact for the Gamma Anthrax, then you can't have inhalation without contact, so the vector for Croisade should be: Contact, Inhalation.
If you don't believe this logic, take a look for yourself. The rules would mention if vectors stacked, since that would be an important mechanic to keep track of. The rules don't outline how to manage multiple vectors, because each vector is managed on its own.
The vector is the method by which the disease infects the
host. Diseases spread by contact must touch the target’s skin. A
chemical seal (see p. 317, SR4) offers complete protection unless
breached. Diseases spread by ingestion may be in food or liquid
consumed by the victim. Diseases spread by inhalation may be
transmitted to the victim via his breathing apparatus; a character
wearing a gas mask, chemical seal, or using an activated cyberware
internal air tank (p. 334, SR4) is immune to its effects. Diseases
spread by injection must be injected into the target’s bloodstream
or alternately through an open wound.