“…Known adverse reactions to the smallpox vaccine that may be life threatening include anaphylaxis, as well as possible association with cardiac reactions including myocarditis, pericarditis, infarction, and angina during its administration. 3 Currently, the CDC and Department of Defense (DoD) maintain active surveillance for potentially life-threatening, moderate to severe, and serious adverse events. 5 Other, nonserious adverse events are reported only through spontaneous surveillance, and their prevalence is expected to be underreported.…”