[quote=@VATROU]
[@Fallenreaper] I just had a terrifying thought. What if a Vampire drank Rach's blood? I'm not sure if the virus could still jump anymore. But if it was ingested by a bloodsucker than what would happen? 

It's not like the virus hasn't encountered alien physiology before. So it could likely adapt to Supernatural beings as well.
[/quote]

Rach's blood is made completely, or likely after this arc, of nanites. They pretty much break down materials, alter their base components, and finally reproduce with the materials into new nanites much like blood from bone marrow. So they would likely start to break down the vampire from the inside out, then create numerous more nanites while pretty much liquefying the vampire. So.... it would be messy.