The effectiveness of the varicella vaccine in clinical practice. N Engl J Med 2001;344:955-60. 2. Storsaeter J, Hallander H, Farrington CP, Olin P, Mollby R, Miller E. Secondary analyses of the efficacy of two acellular pertussis vaccines evaluated in a Swedish phase III trial. · www.nejm.org · 465pox subsequently developed in a close contact of their children, whereas 30 percent of parents of 195 children whose PCR test was positive reported that chickenpox had developed in a close contact. Both of these fin…
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