[Objective] To assess the levels of neutralizing antibodies to rotavirus LLR vaccine strains and the infection condition among children aged 0-5 years old in Shanghai, 2012, in the hope of providing the scientific basis for vaccine research. [Methods] The rotavirus LLR antibody was detected by neutralization test on the sera specimens of 210 healthy children who visited a child health clinic in Shanghai Jing'an District from June to August 2012. The obtained data were analyzed by statistical methods. [Resul...