The reason why children are given the oral rotavirus vaccine is that this condition is due to the fact that children can often have viral diarrhea due to rotavirus sex. The efficacy and effect of the oral rotavirus vaccine is mainly the child’s active immunity, which can prevent or reduce the occurrence of rotavirus enteritis. In rotavirus enteritis, the child will have a large amount of watery diarrhea and egg-flower diarrhea, which can lead to dehydration and electrolyte disturbances, thus posing a great threat to his or her life and health. If a child receives the rotavirus vaccine orally, his or her active immunity is strengthened and the chances of rotavirus enteritis occurring are lower, and even if rotavirus enteritis occurs, the symptoms are mild.