Clover Biopharmaceuticals, Ltd., a global clinical-stage biotechnology company developing novel vaccines and biologic therapeutics, and the International Vaccine Institute, an international nonprofit organization devoted to providing vaccines critical to global public health and based in Seoul, Korea, today announced that Clinical Infectious Diseases has published additional data from SPECTRA, a global Phase 2/3 clinical trial, that showed vaccination with SCB-2019 (CpG 1018/Alum) reduced the risk of transmitting SARS-CoV-2 infection to household members, compared to placebo participants.