The Curella virus, also known as Black Sam, was a widespread pandemic that wiped out over 60% of the population of Galwyndor. There are two strains, Curella I and Curella II, with Type I being the most deadly. It was first discovered in 1322.2 from Wuerlan, and had spread to all corners of the continent within three months.
In 1328.6, a Curella vaccine called Turmocet was distributed throughout the realm. By then, the virus had slowed considerably, but the vaccine worked.