ACAM2000® and JYNNEOS TM (also known as Imvamune or Imvanex) are the only two licensed smallpox vaccines in the United States. Aventis Pasteur Smallpox Vaccine (APSV) is an investigational vaccine that may be used in a smallpox emergency under the appropriate regulatory mechanism (i.e., Investigational New Drug application [IND] or Emergency ... More @Wikipedia
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