Q: Have vaccines been tested in pregnancy?

A: Yes, sources below.

Maternal Influenza Vaccination and Risk for Congenital Malformations: A Systematic Review and Meta-analysis CONCLUSION: This systematic review did not indicate an increased risk for congenital anomalies after maternal influenza immunization adding to the evidence base on the safety of influenza vaccination in pregnancy.”

Pregnant women who have the flu vaccine cut their risk of stillbirth by HALF

Seasonal Trivalent Influenza Vaccination During Pregnancy and the Incidence of Stillbirth: Population-Based Retrospective Cohort Study: “Results: A total of 5076 (8.8%) pregnant women received trivalent influenza vaccine and 377 stillbirths occurred. There were 5.0 and 3.0 stillbirths per 100 000 pregnancy-days among un-vaccinated and vaccinated women, respectively. After adjustment, stillbirth was 51% less likely among vaccinated vs un-vaccinated mothers (aHR, 0.49; 95% confidence interval [CI], .29–.84). The largest relative reduction in stillbirths was observed for births occurring just after influenza season (aHR, 0.33; 95% CI, .12–.88).” (Study)

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