Lessons learnt during establishment of COVID-19 active vaccine safety surveillance in nine African countries.

Cutland CL, Gutu K, Yun JA, Izu A, Mahtab S, Peter J, Ansah NA, Obaro S, Tilahun B, Jambo K, Sow S, Kagucia EW, Chicumbe S, Dlamini T, Browne M, Clothier H, Griffin J, Jiang Y, Lee A, Ghebreab L, Madhi SA, Black SB, Active vaccine safety surveillance team,