From The Union Democrat
July 31, 2018
A person in Tuolumne County tested positive for West Nile virus last week, the first time the sometimes deadly mosquito-borne illness has been detected in a human locally since 2005.
Dr. Bob Bernstein, county health officer, said that staff from the county’s Public Health and Environmental Health departments are investigating how the person may have been exposed to a mosquito infected with the virus.
“This is a rare event in our county,” he said.
Bernstein noted that more people in the county could have come down with West Nile since the last reported case in 2005 and simply not have known it.
Symptoms of the disease are typically not worse than those of a common flu, if even that.