Health officials are investigating a new cluster of eight or more COVID-19 cases in Rockland County tied to a large party earlier this month, but they're running into trouble with contact tracing because people refuse to cooperate.

Rockland County has the highest percentage of daily positive tests (1.2 percent as of Wednesday) of all seven counties in New York's Mid-Hudson region.

While that is still a low number compared with the metrics seen earlier in the crisis, health officials are leery it could quickly surge upward -- especially if they can't find the emerging positive cases early and isolate them through tracing efforts.

The rolling seven-day average of positive daily tests for the Mid-Hudson region is at 1 percent, the same as the rest of the state.

Health officials ask anyone who attended that graduation ceremony to self-quarantine until July 5 -- and to answer the phone if someone from the state's contact tracing team calls