BALTIMORE — While canvassing for a coronavirus vaccination clinic on Baltimore’s Pennsylvania Avenue, James Green met a woman who chastised him for wasting his time.“ That’s the White man’s vaccine, ” she told him this summer.... And several studies found that those who remain hesitant, reluctant or dismissive about getting vaccinated were more likely to distrust institutions such as hospitals, government officials and the news media.... Ambassadors have logged more than 12, 000 unique convers