CNN  —  A year before she passed away, actress Michelle Trachtenberg sought to let her supporters know she was in good health. Her message is being revisited on social media by some of her followers in light of news Wednesday regarding her cause of death at age 39. Trachtenberg, who starred in“Buffy the Vampire Slayer,” died on February 26 in Manhattan as a result of complications from diabetes mellitus, according to a spokesperson for the New York City Office of the Medical Examiner. Best