Medigen Vaccine Biologics Corp.

This study checks how well the EV71 vaccine (Envacgen®) protects children from enterovirus about 6 years after the first shot. It involves 220 children who received the vaccine or a placebo in an earlier study. Researchers measure antibody levels to see if protection lasts.

This study tests an inactivated EV71 vaccine (Envacgen®) in healthy children aged 6 to 10 years, comparing their immune response and safety to younger children aged 2 to 6 years. The goal is to see if the vaccine works as well in older kids to protect against enterovirus 71, whic…