Tozinameran: Myocarditis.

A 16-year-old boy developed myocarditis after receiving the tozinameran COVID-19 vaccine. He experienced symptoms such as recurrent fever, chest pain, and shivering, and was admitted to the hospital. Tests showed elevated levels of troponin I and other markers of heart damage. The boy was treated with lisinopril and eventually made a full recovery with no residual abnormalities. [Extracted from the article]