Tick that causes meat allergy, other rare virus is spreading: What symptoms to watch for

> There were more than 110,000 suspected cases of AGS in the U.S. between 2010 and 2022, according to the CDC, though the true number of cases could be as much as 450,000. The syndrome is not a notifiable condition to the agency. > > Research suggests the syndrome is not specific to the lone star tick alone. A pair of studies last year found the condition may also be caused by blacklegged ticks (also known as deer ticks) and Western blacklegged ticks.