Overall, severe rotavirus gastroenteritis was reported in 5.6% of the placebo group, compared with 2.1% of the combined vaccine group. The time from randomization to first episode of gastroenteritis was significantly longer among participants who received the vaccine, compared with those who received placebo.
“The use of a neonatal dose was investigated in the early phase of development of the rotavirus vaccine but was not pursued because of concerns regarding inadequate immune responses and safety,” wrote Dr. Bines and her associates
They noted that the results of this trial compared favorably with the efficacy of licensed vaccines in similar low-income countries that experienced a high burden of rotavirus disease.
The rates of severe adverse events were similar across all the trial groups. There were no episodes of intussusception seen within the 21-day risk period after immunization, either in the vaccine or placebo groups. However, there was one episode of intussusception in a child on the infant schedule group, which occurred 114 days after the third dose of the vaccine.
“Because intussusception is rare in newborns, the administration of a rotavirus vaccine at the time of birth may offer a safety advantage,” Dr. Bines and her associates said.
The study was supported by the Bill and Melinda Gates Foundation, the National Health and Medical Research Council, PT Bio Farma, and the Victorian government’s Operational Infrastructure Support Program. Authors declared fees, grants, and institutional support from the study sponsors, and three authors also declared a stake in the patent of the RV3-BB vaccine, which is licensed to PT Bio Farma.
SOURCE: Bines JE et al. N Engl J Med. 2018;378:719-30.