Correction: Vaccine equity in low and middle income countries: a systematic review and meta-analysis. - Ahmed Ali, Huda; Hartner, Anna-Maria; Echeverria-Londono, Susy; Roth, Jeremy; Li, Xiang; Abbas, Kaja; Portnoy, Allison; Vynnycky, Emilia; Woodruff, Kim; Ferguson, Neil M.; Toor, Jaspreet; Gaythorpe, Katy A. M. (International Journal for Equity in Health, 2022)