Someone knowingly brought in a plague? We have few streets so if we had a plague...it would spread through our islands in a matter of weeks.

[Granny no. But then those gentleman callers were assholes.]

A whale won't fly down and bite your head off or roast you though, and well, some of the dragons were worshipped by a place called Tevinter and called Old Gods, then when their Maker became angry with the magisters for daring to breach his golden city [there's a heavy air of allegedly hanging on her words, he can probably feel the air quotations] they were tainted along with the magisters to become Archdemons.