From the Lawrence Daily Journal-World for Jan. 31, 1989:

An investigative team from the Centers for Disease Control in Atlanta had recently completed its three-week study on a mumps outbreak in Lawrence, but their findings were inconclusive. The outbreak, which had begun in early October, had infected 205 people, according to a report this week from the Lawrence-Douglas County Health Department. Although reports of new cases had slowed, there were still one or two being reported daily. The CDC investigators reported that “factors such as waning vaccine immunity and the mumps being a different strain were considered unlikely.” A communicable disease nurse who had worked with the team also said that after interviews with mumps victims, they still had no idea how the disease had gotten its recent start in Lawrence. The outbreak had affected students from preschoolers through Kansas University as well as 21 adults between the ages of 20 and 53.