In a cohort study of pregnant persons with mild-to-moderate COVID-19, adverse events rarely occurred in those who received monoclonal antibodies (mAb), and obstetric safety outcomes were not different between treated and nontreated persons who delivered. COVID-19–associated outcomes at 28 days were similar between the groups, as were non-COVID-19–related hospital admissions.
The retrospective, propensity score–matched, cohort study of 944 pregnant persons who had any positive SARS-CoV-2 test also looked at differences based on a risk-adjusted composite of 28-day COVID-19–related hospital admission or emergency department (ED) visit, COVID-19–associated delivery, or mortality. “Among 944 pregnant persons (median age [interquartile range (IQR)], 30 years [26 to 33 years]; White (79.5%; n = 750); median Charlson Comorbidity Index score [IQR], 0 [0 to 0]), 552 received mAb treatment (58%),” the authors report. “Median gestational age at COVID-19 diagnosis or treatment was 179 days (IQR, 123 to 227), and most persons received sotrovimab (69%; n = 382). Of those with known vaccination status, 392 (62%) were fully vaccinated. Drug-related adverse events were uncommon (n = 8; 1.4%), and there were no differences in any obstetric-associated outcome among 778 persons who delivered. In the total population, the risk ratio for mAb treatment of the composite 28-day COVID-19–associated outcome was 0.71 (95% CI, 0.37 to 1.4). The propensity score–matched risk ratio was 0.61 (95% CI, 0.34 to 1.1). There were no deaths among mAb-treated patients compared with 1 death in the nontreated control patients. There were more non-COVID-19–related hospital admissions in the mAb-treated persons in the unmatched cohort (14 [2.5%] vs. 2 [0.5%]; risk ratio, 5.0; 95% CI, 1.1 to 21.7); however, there was no difference in the propensity score–matched rates, which were 2.5% mAb-treated vs. 2% untreated (risk ratio, 1.3; 95% CI, 0.58% to 2.8%).”