[Benign infant myositis associated to influenza B].

Benign childhood myositis is a self-limiting inflammatory condition that primarily affects schoolaged boys during the winter months. It is associated with respiratory viral infections, such as influenza A and B viruses, respiratory syncytial virus (RSV), and Mycoplasma pneumoniae, among others. In September 2022, an epidemiological alert was raised due to a high number of reported cases in the metropolitan area of Buenos Aires.