APA (7th ed.) Citation

Safdar, N., Lehmann, H., Sun, J., Patel, B., Liu, H., Robinson, P., . . . Zhang, X. T. (2024). Evaluating COVID-19 vaccine effectiveness during pre-Delta, Delta and Omicron dominant periods among pregnant people in the USA: Retrospective cohort analysis from a nationally sampled cohort in National COVID Collaborative Cohort (N3C). BMJ Publishing Group.

Chicago Style (17th ed.) Citation

Safdar, Nasia, et al. Evaluating COVID-19 Vaccine Effectiveness During Pre-Delta, Delta and Omicron Dominant Periods Among Pregnant People in the USA: Retrospective Cohort Analysis from a Nationally Sampled Cohort in National COVID Collaborative Cohort (N3C). BMJ Publishing Group, 2024.

MLA (9th ed.) Citation

Safdar, Nasia, et al. Evaluating COVID-19 Vaccine Effectiveness During Pre-Delta, Delta and Omicron Dominant Periods Among Pregnant People in the USA: Retrospective Cohort Analysis from a Nationally Sampled Cohort in National COVID Collaborative Cohort (N3C). BMJ Publishing Group, 2024.

Warning: These citations may not always be 100% accurate.