Residents and visitors in Door County are being advised to be more vigilant in their personal protective measures to prevent mosquito bites. The Door County Public Health Department was notified Wednesday that a dead crow from the county tested positive for West Nile Virus. It marks the second year in a row that a bird tested positive for the disease. The first instance happened in July of 2017. Sue Powers, the department’s interim manager/health officer, says once the presence of West Nile Virus in an area is confirmed for the season, no further testing needs to be done.