RT Journal Article SR Electronic T1 What’s the evidence for COVID-19 booster shots? JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E1400 OP E1401 DO 10.1503/cmaj.1095959 VO 193 IS 35 A1 Lauren Vogel A1 Diana Duong YR 2021 UL http://www.cmaj.ca/content/193/35/E1400.abstract