“…The 3 cases presented in the Practice sec tion of the May 25, 2020, issue of CMAJ provide an informative discussion of the diagnosis and treatment of Lyme carditis and neuroborreliosis in a tertiary care centre. [1][2][3] I am a retired Ontario pediatri cian and coroner, having practised for more than 50 years. In the last 15 years I was a member of the Paediatric Death Review Committee of the Ontario Office of the Chief Corner.…”