Periodic intensification of routine immunization (PIRI): modeling a novel strategy to supplement routine and pulsed measles vaccination
This study uses a stochastic age-structured SIR model to demonstrate that Periodic Intensification of Routine Immunization (PIRI) can outperform or match Supplemental Immunization Activities (SIAs) in reducing measles cases, particularly in settings with intermediate routine immunization coverage or those experiencing continuously increasing coverage.