Pre-Delta, Delta, and Omicron Periods of the Coronavirus Disease 2019 (COVID-19) Pandemic and Health Outcomes During Delivery Hospitalization

Disease severity across pandemic waves among pregnant individuals with COVID-19

(2023) Judge-golden C et al.   AMERICAN JOURNAL OF OBSTETRICS AND GYNECOLOGY

Pregnancy outcomes by pandemic wave among pregnant individuals with COVID-19 infection

(2023) Craig A et al.   AMERICAN JOURNAL OF OBSTETRICS AND GYNECOLOGY

Pregnancy outcomes and vaccine effectiveness during the period of omicron as the variant of concern, INTERCOVID-2022: a multinational, observational study

(2023) Jose Villar et al.   LANCET

Safety and Effectiveness of Maternal COVID-19 Vaccines Among Pregnant People and Infants

(2023) Katherine E. Fleming-Dutra et al.   OBSTETRICS AND GYNECOLOGY CLINICS OF NORTH AMERICA

COVID-19 Surveillance After Expiration of the Public Health Emergency Declaration ― United States, May 11, 2023

(2023) Benjamin J. Silk et al.   MMWR-MORBIDITY AND MORTALITY WEEKLY REPORT

Interim Recommendations for Use of Bivalent mRNA COVID-19 Vaccines for Persons Aged ≥6 Months — United States, April 2023

(2023) Danielle L. Moulia et al.   MMWR-MORBIDITY AND MORTALITY WEEKLY REPORT

Effectiveness of Monovalent mRNA COVID-19 Vaccination in Preventing COVID-19–Associated Invasive Mechanical Ventilation and Death Among Immunocompetent Adults During the Omicron Variant Period — IVY Network, 19 U.S. States, February 1, 2022–January 31, 2023

(2023) Jennifer DeCuir et al.   MMWR-MORBIDITY AND MORTALITY WEEKLY REPORT

Estimates of SARS-CoV-2 Seroprevalence and Incidence of Primary SARS-CoV-2 Infections Among Blood Donors, by COVID-19 Vaccination Status — United States, April 2021–September 2022

(2023) Jefferson M. Jones et al.   MMWR-MORBIDITY AND MORTALITY WEEKLY REPORT

Acute and Postacute COVID-19 Outcomes Among Immunologically Naive Adults During Delta vs Omicron Waves

(2023) Margaret K. Doll et al.   JAMA Network Open

Maternal and perinatal outcomes following pre-Delta, Delta, and Omicron SARS-CoV-2 variants infection among unvaccinated pregnant women in France and Switzerland: a prospective cohort study using the COVI-PREG registry

(2023) Guillaume Favre et al.   The Lancet Regional Health Europe

Changes in rates of adverse pregnancy outcomes during the COVID-19 pandemic: a cross-sectional study in the United States, 2019–2020

(2022) Regina M. Simeone et al.   Journal of Perinatology

Covid-19: What do we know about omicron sublineages?

(2022) Elisabeth Mahase   BMJ-British Medical Journal

Genomic Surveillance for SARS-CoV-2 Variants: Predominance of the Delta (B.1.617.2) and Omicron (B.1.1.529) Variants — United States, June 2021–January 2022

(2022) Anastasia S. Lambrou et al.   MMWR-MORBIDITY AND MORTALITY WEEKLY REPORT

Maternal and perinatal outcomes of SARS‐CoV ‐2 infection in unvaccinated pregnancies during Delta and Omicron waves

(2022) P. Birol Ilter et al.   ULTRASOUND IN OBSTETRICS & GYNECOLOGY

Impact of vaccination and the omicron variant on COVID-19 severity in pregnant women

(2022) Haemin Kim et al.   AMERICAN JOURNAL OF INFECTION CONTROL

Maternal and Perinatal Outcomes Associated With the Omicron Variant of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) Infection

(2022) Angela R. Seasely et al.   OBSTETRICS AND GYNECOLOGY

Comparison of clinical characteristics of COVID-19 in pregnant women between the Delta and Omicron variants of concern predominant periods

(2022) Kensuke Shoji et al.   JOURNAL OF INFECTION AND CHEMOTHERAPY

Pregnancy outcomes after SARS-CoV-2 infection in periods dominated by delta and omicron variants in Scotland: a population-based cohort study

(2022) Sarah J Stock et al.   Lancet Respiratory Medicine

Mortality Risk Among Patients Hospitalized Primarily for COVID-19 During the Omicron and Delta Variant Pandemic Periods — United States, April 2020–June 2022

(2022) Stacey Adjei et al.   MMWR-MORBIDITY AND MORTALITY WEEKLY REPORT

Estimation of COVID-19 mRNA Vaccine Effectiveness Against Medically Attended COVID-19 in Pregnancy During Periods of Delta and Omicron Variant Predominance in the United States

(2022) Stephanie J. Schrag et al.   JAMA Network Open

Effectiveness of Bivalent mRNA Vaccines in Preventing Symptomatic SARS-CoV-2 Infection — Increasing Community Access to Testing Program, United States, September–November 2022

(2022) Ruth Link-Gelles et al.   MMWR-MORBIDITY AND MORTALITY WEEKLY REPORT

Preterm birth and severe maternal morbidity associated with SARS-CoV-2 infection during the Omicron wave

(2022) Moti Gulersen et al.   American Journal of Obstetrics & Gynecology MFM

Adverse pregnancy outcomes, maternal complications, and severe illness among U.S. delivery hospitalizations with and without a COVID-19 diagnosis

(2021) Jean Y Ko et al.   CLINICAL INFECTIOUS DISEASES

Risk for Stillbirth Among Women With and Without COVID-19 at Delivery Hospitalization — United States, March 2020–September 2021

(2021) Carla L. DeSisto et al.   MMWR-MORBIDITY AND MORTALITY WEEKLY REPORT

Clinical manifestations, risk factors, and maternal and perinatal outcomes of coronavirus disease 2019 in pregnancy: living systematic review and meta-analysis

(2020) John Allotey et al.   BMJ-British Medical Journal