I wouldn't doubt it.

The crucifixes, I get.  Being unholy abominations and all that.  The garlic, I don't.  I'm sure Dracula mentioned it somewhere...
Ah, yes.  Apparently garlic is a mosquito repellent, so since vampires drink blood like mosquitos, garlic would thus also repel vampires.
After writing mosquito so many times, I now itch all over.

If Jaspin really thinks that Elizabeth would believe that for a second, he is a dumb, dumb man.  If anything, she'd be angry that he'd insult her intelligence like that.