The Impact of COVID-19 Vaccination Campaigns on the Resurgence of Measles: The Case of Urban Health Centers in Guelmim, Morocco

Abstract Background The COVID-19 pandemic significantly disrupted routine immunization services worldwide, leading to concerns about a resurgence of vaccine-preventable diseases such as measles. This study assessed the impact of COVID-19 vaccination campaigns on measles vaccine uptake among children in Guelmim, Morocco. Methods A descriptive cross-sectional study was conducted from March to May 2025 in three urban health centers in Guelmim. A structured, interviewer-administered questionnaire was used to collect data from 350 mothers of children under five. Variables included sociodemographic characteristics, COVID-19 and measles vaccination status, behavioral factors, information sources, and access to services. Bivariate analyses were performed using Pearson’s chi-square test (p < 0.05). Results Only 44.3% of children were reported as vaccinated against measles. Missed child vaccinations during the COVID-19 period (p < 0.001), insufficient maternal information (p < 0.001), lack of trust in public health vaccines (p < 0.001), and poor access to vaccination centers (p < 0.001) were significantly associated with lower measles vaccine coverage. Receipt of catch-up doses and participation in vaccination campaigns were positively associated with vaccination uptake. While 72.3% of mothers perceived measles as serious, awareness did not consistently translate into action. Conclusion The COVID-19 pandemic disrupted both access to and confidence in routine immunization in Guelmim. Targeted strategies—such as strengthening vaccine outreach, improving information flow, and restoring trust in the health system—are urgently needed to address immunity gaps and prevent future measles outbreaks.