From Nassau County Emergency Management:
As of 6 pm, March 28 2020, FDOH Nassau has received a new case report of a positive COVID-19 test in a 72 year old male resident. The Health Department is conducting case investigation and contact tracing. The individual will remain in isolation until released by public health. This brings the total case count to date to seven for Nassau County.
More information on about Florida cases and testing are available at: https://floridahealthcovid19.gov/