Influenza & COVID-19 Obstetric and Perinatal Epidemiology Study in India

All pregnant women enrolled in the study will receive standard of care throughout their pregnancy, labor and delivery and post-partum to discharge. Wherever possible, study visits will coincide with regular antenatal (ANC) care and blood draws will be added to standard blood draws during ANC, labor and delivery and postpartum care. Women will be counselled about procedure to reduce the risk of acquiring ORV during pregnancy. Since this study is observational, we do not anticipate any specific safety concerns with study interviews and procedures, but the investigators will monitor potential adverse events to determine if they are likely or possibly study related. PRIMARY OBJECTIVE: Determine the prevalence, incidence, and maximal severity of symptomatic or asymptomatic COVID-19 in pregnant women to day 42 postpartum/after miscarriage on maternal outcomes. Secondary analysis will evaluate whether influenza/Other Respiratory Viruses (ORV) infection or COVID-19 vaccination modifies or mediates this risk. SECONDARY OBJECTIVE: Determine the effect of maternal COVID-19 infection on the fetus and/or neonate during pregnancy through day 7 of life. Secondary analysis will focus on whether influenza/ORV or vaccination modifies, and pre-term birth mediates this risk. EXPLORATORY OBJECTIVE: Characterize patterns and trajectories of host response/ inflammatory biomarkers as potential mediators of COVID-19 ± Influenza and ORV infection on progression to severe illness in pregnant women/mothers admitted to Government Medical College hospital with COVID-19. Modifiers include COVID-19 , Influenza and other ORV vaccinations.