Background: Manyaspects of the severe acute respiratorysyndrome coronavirus 2 (SARSCoV2)pandemicin 2019 have been unclear, especially in newborns, and reports of neonatal diseases are usually associated with perinatal infection. Objectives: The purpose of this study was to evaluate clinical and para-clinical manifestations in newborns that contracted the infection after birth. Methods: This observational research was conducted from October 2020 to March 2022 to examine postnatal SARSCoV2 infection in infants admitted to the NICU or neonatal ward at the Children’, s Medical Center in Tehran, Iran. Inclusion in the study was open to neonates who had positive RT-PCR results postnatally. Results: In total, 55 newborns were confirmed to have postnatal SARSCOV2. Fever was the most frequently observed symptom, with 35 (61%). Necrotizing enterocolitis was seen in 18% of neonates, and 30% of them were preterm. Neutropenia was seen in 34% of cases, with five cases having severe neutropenia. All neonates had a normal platelet count. Twenty percent of patients showed C-reactive protein higher than 6 mg/L. Two newborns had co-existing bacterial urinary tract infections. Our neonates didn’, t require antiviral, anticoagulant, or corticosteroid medications, and they recovered while receiving only supportive care. Everyone in the group of newborns was discharged without complications, and there were no deaths. Conclusions: The high rate of fever, high C-reactive protein, and neutropenia in SARSCoV2 neonates suggests that more observational research is needed to compare these symptoms to bacterial sepsis to avoid the overuse of antibiotics in these patients.