Public health, explained: Sign up to receive Healthbeat’s free New York City newsletter here. Olivia Killingsworth, an actor and bookkeeper living in Brooklyn has a rare life-threatening genetic condition for which she sees specialists, limits exercise, takes prescribed medication to lower her blood pressure, and monitors her heart rate with a watch. The 44-year-old is one of some 450,000 New Yorkers who could lose health insurance at the end of the month.