Immunological non-inferiority and safety of a quadrivalent inactivated influenza vaccine versus two trivalent inactivated influenza vaccines in China: Results from two studies.

Who Universal Trial Numbers (utns): U1111-1174-4615 and U1111-1174-4698.

Clinicaltrials.gov: NCT04210349 and NCT03430089.

Immunogenicity and Safety of Inactivated Enterovirus 71 Vaccine in Children Aged 36-71 Months: A Double-Blind, Randomized, Controlled, Non-inferiority Phase III Trial.

Background: The Sinovac enterovirus 71 (EV71) vaccine has been given to children aged 6-35 months with good safety, immunogenicity, and efficacy. Further exploration is needed for the application of Sinovac EV71 vaccine in older children.

Methods: A phase III, double-blind, single-center, randomized, controlled, non-inferiority, and bridging-designed trial enrolled 300 participants aged 6-35 months and 600 participants aged 36-71 months.