The Influence of Climate on Critically Ill Pregnant COVID-19 Patients, as Revealed by the Inflammation Indexes, in Spring versus Autumn 2021 Infection

(1) Background: Seasonality is an important environmental factor that influences immune re-sponses (2) Methods: In a retrospective study, we included all pregnant patients admitted to the Elena Doamna Obstetrics and Gynecology Hospital with a critical form of COVID-19 infection between 1 January and 1 December 2021. The blood counts collected on the specific A, H and E Brixia score- collection days, or the ones collected closest to those days, were considered in our study. We also studied the differences between the two groups regarding the inflammation in-dexes exhibited on those specific days: A (admittance), H (highest Brixia score), and E (end of hospitalization). (3) Results: The values of NLR, dNLR, SII, and AISI are significantly higher and IIC is significantly lower for the spring group versus the autumn group, especially on the H and E Brixia score-collection days. (4) Conclusions: These results suggest that severe-COVID-19 in-flammation was significantly higher in the spring of 2021 in Romania than in autumn 2021, in regard to pregnant patients.