{Reference Type}: Case Reports
{Title}: Vaccine-related influenza virus B infection in a child with an undiagnosed B-cell acute lymphoblastic leukemia.
{Author}: Di Pietra G;Di Sopra S;Conciatori V;Lavezzo E;Franchin E;Petris MG;Biffi A;Castagliuolo I;Salata C;Del Vecchio C;
{Journal}: Int J Infect Dis
{Volume}: 147
{Issue}: 0
{Year}: 2024 Jul 20
{Factor}: 12.074
{DOI}: 10.1016/j.ijid.2024.107184
{Abstract}: We report a case of Influenza type B (lineage Yamagata) infection in a child who received the live attenuated influenza virus vaccine before being diagnosed with B-cell acute lymphoblastic leukemia. The patient developed a mild disease that persisted for 18 days and resolved without antiviral treatment. The prolonged infection of an attenuated virus in an immunocompromised host might pose a risk of reversion or evolution to a more pathogenic strain. Prompt prevention, identification, and monitoring of similar cases are desirable to avoid the development of severe illness, which could complicate patient management.