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Clinical responses to undiluted and diluted smallpox vaccine.
Frey SE, Couch RB, Tacket CO, Treanor JJ, Wolff M, Newman FK, Atmar RL, Edelman R, Nolan CM, Belshe RB; National Institute of Allergy and Infectious Diseases Smallpox Vaccine Study Group. Frey SE, et al. N Engl J Med. 2002 Apr 25;346(17):1265-74. doi: 10.1056/NEJMoa020534. Epub 2002 Mar 28. N Engl J Med. 2002. PMID: 11923490 Free article. Clinical Trial.