A phase I/II randomized, double-blinded, placebo-controlled trial of a self-amplifying Covid-19 mRNA vaccine oleh Jenny G. Low, Ruklanthi de Alwis, Shiwei Chen, Shirin Kalimuddin, Yan Shan Leong, Tania Ken Lin Mah, Natalene Yuen, Hwee Cheng Tan, Summer L. Zhang, Jean X. Y. Sim, Yvonne F. Z. Chan, Ayesa Syenina, Jia Xin Yee, Eugenia Z. Ong, Rose Sekulovich, Brian B. Sullivan, Kelly Lindert, Sean M. Sullivan, Pad Chivukula, Steven G. Hughes, Eng Eong Ooi