Featured HealthCOVID-19 vaccine: 8,439 mild adverse events recorded in Nigeria –NPHCDCAliyu DANLADIApril 17, 2021April 17, 2021 by Aliyu DANLADIApril 17, 2021April 17, 20210498 The National Primary Health Care Development Agency (NPHCDA) said a total of 8,439 mild adverse events following immunisation (AEFI) had been reported since vaccination began