IN the wake of adverse reactions, the Tennessee and Virginia Departments of Health are halting use of Johnson & Johnson’s COVID-19 vaccine as federal officials investigate reports of six people developing a rare and severe type of blood clot after receiving the vaccine. The decision of local officials to suspend use of the vaccines comes hours after the U.S. Food and Drug Administration and Centers for Disease Control and Prevention called for a pause in the vaccine’s use as the FDA conducts an investigation into the cases, which were all reported in women aged 18-48 about 6-13 days after vaccination.