Nationwide safety surveillance of COVID-19 mRNA vaccines following primary series and first booster vaccination in Singapore oleh Sreemanee Raaj Dorajoo, Hui Xing Tan, Chun Hwee Desmond Teo, Jing Wei Neo, Yen Ling Koon, Jing Jing Amelia Ng, Mun Yee Tham, Pei Qin Belinda Foo, Li Fung Peck, Pei San Ang, Theen Adena Lim, Wang Woon Jalene Poh, Su Lin Dorothy Toh, Cheng Leng Chan, Ian Douglas, Bee Leng Sally Soh