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Coronavirus disease 2019 (COVID-19) predominantly involves the lungs, albeit many other organ systems, including the hypothalamic-pituitary-adrenal (HPA) axis, can be affected due to the expression of the angiotensin-converting enzyme 2 (ACE2) binding receptor. Few studies have reported the involvement of adrenal gland and the HPA axis during the acute phase of COVID-19; however, the data on the long-term effect of COVID-19 on the HPA axis after acute infection is scarce. To assess and compare the changes in HPA axis in mild, moderate and severe COVID-19 categories at ≥ 3 months after acute infection. A prospective, observational study was conducted to assess the HPA axis status among COVID-19 subjects at least 3 months after recovery from acute infection. The study was conducted from June 2021 to May 2022. Subjects visited the hospital in the fasting state (8.00–9.00am), serum cortisol levels were measured at baseline, 30 and 60 minutes after a 1-μg short Synacthen test (SST). A total of 66 subjects ≥ 18 years of age were included in the study. The mean age (SD) was 49.13 ± 11.9 years, 45(68.18%) were male and 21 (31.81%) were female subjects. The mean BMI in the study was 25.91 ± 4.26 kg/m 2 . Seventeen (25.8%) subjects had mild, twelve (18.2%) had moderate and thirty-seven (56.1%) subjects had severe COVID-19 infection. Out of the sixty-six subjects with COVID-19, nine subjects (9/66, 13.63%) had peak serum cortisol &lt; 496.62 nmol/L suggestive of adrenal insufficiency (AI). SST peak serum cortisol levels did not differ significantly across the disease severity [Mild, (628.50 ± 214.65 nmol/L) vs moderate, [603.39 ± 161.95 nmol/L) vs severe, (597.59 ± 163.05 nmol/L),  P  = 0.617]. Six subjects with AI came for follow-up at 12 months, and all had normal HPA axis. HPA axis is affected in 13.63% (9/66) of subjects at least 3 months after recovery from COVID-19 infection. AI in COVID-19 might be transient and would recover spontaneously. These findings have important implications for the clinical care and long-term follow-up of subjects after COVID-19 infection.

Hypothalamic-Pituitary Adrenal Axis Status 3 Months After Recovery From COVID-19 Infection