Tickborne disease has been on the rise in the US, with the number of cases growing 25% from 2011 to 2019. Among them is babesiosis, which has become significantly more prevalent in the Northeast in recent years.

Seven states were already considered to have endemic transmission of babesiosis, with consistent presence of the disease: Connecticut, Massachusetts, Minnesota, New Jersey, New York, Rhode Island and Wisconsin. A new report from the US Centers for Disease Control and Prevention added three others to that list – Maine, New Hampshire and Vermont – where case rates have grown the fastest and now match or surpass other states.