Enterovirus 71 (EV71), a major pathogen that is responsible for causing hand-foot-and-mouth disease (HFMD) worldwide, is a member of the Human Enterovirus species A, family Picornaviridae. Since the late 1990s, a series of large HFMD epidemics caused by EV71 have been reported in the Asia-Pacific region. Notably, there is evidence that the most severe cases from these epidemic outbreaks are associated with neurological disorders with CNS involvement caused by EV71 infection. Because of these EV71 infection-related public health issues, the research and development of EV71 vaccine candidates have been heavily promoted. Recently, several EV71 vaccine candidates have been evaluated in animals but no final results of clinical trials, including inactivated vaccine, attenuated vaccine, subunit vaccine, DNA vaccine, epitope peptide vaccine, virus-like particles (VLPs). Basing on the previous studies of elicited protection in mice and rhesus monkeys, a formalin-inactivated EV71 vaccine (Human Diploid cell, KMB-17 Cell) has been licensed by SFDA in China, Dec. 2010. The phase I clinical and phase II trials were completed, in Guangxi Province, China. The results of these clinical trials showed that this vaccine was safe and could induce effective antibodies for the infants. The purpose of phase III is to evaluate the protected and efficacy of the formalin-inactivated EV71 vaccine in Chinese infants and children (from 6 to 71 months old).
Age range
6 Months – 71 Months
Sex
ALL
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Evaluate the safety of Inactivated EV 71 Vaccine (Human Diploid Cell, KMB-17) in Chinese Infants and children (from 6 to 71 months old)
Timeframe: within the first 28 days after the first vaccination
Evaluate the safety of Inactivated EV 71 Vaccine (Human Diploid Cell, KMB-17) in Chinese Infants and children (from 6 to 71 months old)
Timeframe: at the 28 days after the second vaccination
Evaluate the efficacy of Inactivated EV 71 Vaccine (Human Diploid Cell, KMB-17) in Chinese Infants and children (from 6 to 71 months old)
Timeframe: within two years after the second vaccination