{Reference Type}: Letter {Title}: Immunogenicity of a single dose of BNT162b2, ChAdOx1 nCoV-19, or CoronaVac against SARS-CoV-2 delta and omicron variants among previously infected adults: A randomized trial. {Author}: Niyomnaitham S;Toh ZQ;Licciardi PV;Wongprompitak P;Srisutthisamphan K;Copeland KK;Chokephaibulkit K;Niyomnaitham S;Toh ZQ;Licciardi PV;Wongprompitak P;Srisutthisamphan K;Copeland KK;Chokephaibulkit K; {Journal}: J Infect {Volume}: 85 {Issue}: 4 {Year}: Oct 2022 {Factor}: 38.637 {DOI}: 10.1016/j.jinf.2022.06.014 {Abstract}: