Humoral and cellular response to the COVID-19 vaccine in immunocompromised children.

Background: A suboptimal response to the 2-dose COVID-19 vaccine series in the immunocompromised population prompted recommendations for a 3rd primary dose. We aimed to determine the humoral and cellular immune response to the 3rd COVID-19 vaccine in immunocompromised children.

Methods: Prospective cohort study of immunocompromised participants, 5-21 years old, who received 2 prior doses of an mRNA COVID-19 vaccine.

Conservative Management of Pneumatosis Intestinalis and Portal Venous Gas After Pediatric Liver Transplantation.

Background: Pneumatosis intestinalis (PI) is a rare pathologic finding in pediatric liver transplant (PLT) recipients. The presentation and course of PI can range from asymptomatic and clinically benign to life threatening, with no consensus regarding management of PI in children. We aim to review the clinical presentation and radiologic features of PLT recipients with PI and to report the results of conservative management.