In Mendocino County, and parts of Marin and Monterey counties, 35% to 40% of outdoor ticks tested had Lyme disease:
https://www.sfgate.com/local/article/northern-california-tick-hot-spots-17770270.php
California ticks like to hang out on the beach, dunes, and chaparral too:
https://www.sfgate.com/california-news/article/Tick-time-bomb-California-infestation-16233704.php
Up to 31% of those ticks carried Lyme disease.
Live elsewhere in the Golden State? Don’t get too smug:

https://www.bayarealyme.org/about-lyme/lyme-disease-facts-statistics/
Two California friends were sick with Lyme disease for many years.
Prime tick season is coming soon. Be careful out there!
— Rex


