BURLINGTON, Vt. — Epidemiologists at the Vermont Department of Health are concealing the number of refugees with contagious active tuberculosis nearly a month after Watchdog reported that more than one-third of Vermont’s resettled refugees test positive for TB. Earlier this month, Watchdog revealed that 35 percent of Vermont’s incoming refugees in the past four years tested positive for tuberculosis. How many of those cases are contagious and symptomatic, however, remains a secret, as state epidemiologists and top officials at the Health Department have spent weeks blocking efforts to obtain the data. Refugees brought to the United States take TB tests...