With all the news about how few tests have been run in the US, I'd go with 'undercounting'. Also looks like some/many of the WA cases are in a senior care place

With all the news about how few tests have been run in the US, I'd go with 'undercounting'. Also looks like some/many of the WA cases are in a senior care place. If the initial spread there was among a group of elderly people, I'd expect it to be more lethal than among a larger more varied population.