Fever Year was the term used to describe the first plague on Pern.
The Fever Year was the 16th year AL. It was a plague-epidemic which decimated the Northern Continent. It was the cause of death for Emily Boll. Ezra Keroon was another victim; he went to sleep after hearing that Sean Connell and Carenath went to check on the AIVAS building in the Southern Continent. He never woke.