In the press conference this morning, King County officials said they had been testing predominantly the most severe cases only, and that they were likely not t

In the press conference this morning, King County officials said they had been testing predominantly the most severe cases only, and that they were likely not testing the community of people who had flu-like but otherwise mild symptoms. So I'd go with undercounting. Additionally, many but not all of the cases are linked to a elderly care facility, where underlying medical issues with lungs, hearts, and diabetes caused a higher fatality rate. They said they expected the number of cases to increase, and they are increasing testing capacity to hundreds of tests daily.