Commemorating World Immunization Week, 2021: The RI experience of the PAS Project As Nigeria marks World Immunization Week for 2021 celebrated from April 24th - 30th every year, it is important to highlight the use of vaccines in mitigating vaccine preventable diseases (VPDs). 1.0 World Immunization Week 2021 As Nigeria marks World Immunization Week for 2021 celebrated from April 24th – 30th every year, it is important to highlight the use of vaccines in mitigating vaccine preventable diseases (VPDs) and to measure the progress of Nigeria’s journey for self-reliance. According to the Worl...