American Society for Transplantation and Cellular Therapy Series #10: Management of Parainfluenza and Human Metapneumovirus Infections in Hematopoietic Cell Transplantation and Cellular Therapy Recipients.

In 2019, The Practice Guidelines Committee of the American Society for Transplantation and Cellular Therapy partnered with its Transplant Infectious Diseases Special Interest Group to update the 2009 compendium-style infectious disease guidelines for hematopoietic cell transplantation (HCT). The new format is now structured around frequently asked questions (FAQs), concise tables, and figures to better support clinical providers. Here, a panel of experts in HCT and infectious diseases identified relevant FAQs, which they graded based on the strength of clinical practice recommendations and the level of supporting evidence, as described herein. In the ninth set of guidelines in the series, the focus is on parainfluenza virus and human metapneumovirus, with FAQs addressing epidemiology, incidence, clinical manifestations, risk factors, diagnosis, prevention (including vaccines), and therapeutic management in recipients of HCT and chimeric antigen receptor T cells (cellular therapy). Special considerations for pediatric patients, unmet needs, and future research directions are conveyed in the guidelines.