| horizontal transmission of rhesus monkey rotavirus-based quadrivalent vaccine during a phase 3 clinical trial in caracas, venezuela. | during a phase 3 clinical trial of rhesus monkey rotavirus-based quadrivalent vaccine in venezuela, 2207 infants received 3 oral doses of vaccine (4 x 105 plaque-forming units/dose) or placebo at ages approximately 2, 3, and 4 months; 219 (14%) of 1537 stools obtained during 1550 diarrheal episodes in postvaccination surveillance were rotavirus-positive by enzyme-linked immunosorbent assay. with the use of various vp7 and vp4 primers for genotyping purposes, 213 of 219 rotavirus-positive stools ... | 2003 | 12599053 |