Tetravalent Human-Rhesus Reassortant Rotavirus Vaccine
Interference between oral poliovirus vaccine (OPV) and monovalent (RRV-S1) and tetravalent (RRV-TV) rhesus-human rotavirus vaccines was evaluated. Serum antibody responses to OPV and rotavirus vaccines and efficacy of rotavirus vaccines were compared among control and vaccine groups stratified by number of concurrent OPV and rotavirus vaccinations received. Neutralizing antibody titers to poliovirus type 1 tended to rise more steeply in placebo than RRV-TV recipients, but there were no significant differences in seroprevalence or in geometric mean titers (GMTs) of antibodies to types 1, 2, or 3 among groups. Concurrent OPV resulted in lower IgA GMTs to rotavirus in RRV-S1 but not RRV-TV recipients. Rotavirus gastroenteritis rates among rotavirus vaccines did not differ by number of concurrent OPV doses received, but the sample sizes were too small to rule out any effect. These results suggest OPV and rhesus-human rotavirus vaccines may be given at the same visit in the United States.