Maybe not, but you think that the vamp expert from the same world as Jerry - who is now a vamp - would probably know if magic could save that kind. If it was possible, he'd have said so.
And how long did it take to get her? How many others will they change - how many do we not even know about who could have already left town and gone elsewhere and are just making their own little individual armies of vamps? How long is that shit going to take?
While you argue about him having a chance, he's killing more people. So that puts their lives on you, lady. Go right on ahead and keep looking for magical ways that probably don't even exist. I'll be over here hunting a vamp to stake.