Negative = (Total Tested - Positives).
Vermont reports both Currently Hospitalized (implicitly, confirmed cases only) and Hospitalized Under Investigation. For Currently Hospitalized, we sum these two numbers.
As of May 2, Vermont is reporting people tested.
Between May 15 and May 16, Vermont decreased their total tests by about 1,000; as of May 16 it is unclear if this was a typo or a revision of a previously preliminary count.