Razai, MS; Mansour, R; Goldsmith, L; Freeman, S; Mason-Apps, C; Ravindran, P; Kooner, P; ... Oakeshott, P; + view all Razai, MS; Mansour, R; Goldsmith, L; Freeman, S; Mason-Apps, C; Ravindran, P; Kooner, P; Berendes, S; Morris, J; Majeed, A; Ussher, M; Hargreaves, S; Oakeshott, P; - view fewer (2023) Interventions to increase vaccination against COVID-19, influenza and pertussis during pregnancy: a systematic review and meta-analysis. Journal of Travel Medicine , 30 (8) , Article taad138. 10.1093/jtm/taad138.

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Abstract

BACKGROUND: Pregnant women and their babies face significant risks from three vaccine-preventable diseases: COVID-19, influenza and pertussis. However, despite these vaccines’ proven safety and effectiveness, uptake during pregnancy remains low. METHODS: We conducted a systematic review (PROSPERO CRD42023399488; January 2012–December 2022 following PRISMA guidelines) of interventions to increase COVID-19/influenza/pertussis vaccination in pregnancy. We searched nine databases, including grey literature. Two independent investigators extracted data; discrepancies were resolved by consensus. Meta-analyses were conducted using random-effects models to estimate pooled effect sizes. Heterogeneity was assessed using the I2 statistics. RESULTS: From 2681 articles, we identified 39 relevant studies (n = 168 262 participants) across nine countries. Fifteen studies (39%) were randomized controlled trials (RCTs); the remainder were observational cohort, quality-improvement or cross-sectional studies. The quality of 18% (7/39) was strong. Pooled results of interventions to increase influenza vaccine uptake (18 effect estimates from 12 RCTs) showed the interventions were effective but had a small effect (risk ratio = 1.07, 95% CI 1.03, 1.13). However, pooled results of interventions to increase pertussis vaccine uptake (10 effect estimates from six RCTs) showed no clear benefit (risk ratio = 0.98, 95% CI 0.94, 1.03). There were no relevant RCTs for COVID-19. Interventions addressed the ‘three Ps’: patient-, provider- and policy-level strategies. At the patient level, clear recommendations from healthcare professionals backed by text reminders/written information were strongly associated with increased vaccine uptake, especially tailored face-to-face interventions, which addressed women’s concerns, dispelled myths and highlighted benefits. Provider-level interventions included educating healthcare professionals about vaccines’ safety and effectiveness and reminders to offer vaccinations routinely. Policy-level interventions included financial incentives, mandatory vaccination data fields in electronic health records and ensuring easy availability of vaccinations. CONCLUSIONS: Interventions had a small effect on increasing influenza vaccination. Training healthcare providers to promote vaccinations during pregnancy is crucial and could be enhanced by utilizing mobile health technologies.

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