COVID-19 vaccine wastage in the midst of vaccine inequity: causes, types and practical steps. Issue 4 (26th April 2022) - Lazarus, Jeffrey V; Abdool Karim, Salim S; van Selm, Lena; Doran, Jason; Batista, Carolina; Ben Amor, Yanis; Hellard, Margaret; Kim, Booyuel; Kopka, Christopher J; Yadav, Prashant