TY - JOUR AU - LeDuc, James W. AU - Becher, John T1 - Current Status of Smallpox Vaccine T2 - Emerging Infectious Disease journal PY - 1999 VL - 5 IS - 4 SP - 593 SN - 1080-6059 AB - KW - United States DO - 10.3201/eid0504.9904029 UR - https://wwwnc.cdc.gov/eid/article/5/4/99-04029_article ER - End of Reference