Pregnant women’s attitudes toward Zika virus vaccine trial participation

•Most pregnant women demonstrated willingness to participate in ZIKV vaccine trials.•There was higher acceptance of non-replication competent vaccine platforms trials.•A desire to protect the baby was the most important decisional factor.•Most women who declined would reconsider given evidence of safety in pregnancy. As Zika virus infection during pregnancy can cause a range of congenital anomalies, pregnant women may be a target population for vaccination in future outbreaks. Their inclusion in vaccine trials is critical to ensure safe and effective vaccines in pregnancy. Though many vaccine candidates are in development, pregnant women’s willingness to participate in Zika virus vaccine research is unknown. This study aims to describe pregnant women’s attitudes toward Zika virus vaccine research participation, as well as perceived barriers to and facilitators of enrollment. Pregnant and recently postpartum women (n = 128) attending prenatal care at Massachusetts General Hospital completed surveys querying their willingness to participate in four hypothetical Zika virus vaccine trials and their motivations for participation. Demographics, information on prior Zika virus exposure, and vaccine acceptance were collected. Most women (77%) accepted participation in at least one hypothetical Zika virus vaccine trial, and women were significantly more likely to accept prospective enrollment in an inactivated vaccine trial compared to a live-attenuated vaccine trial (p-value