i'm not entirely certain of the veracity of the source
There was no indication of actual danger, or any frame of reference to other infectious viruses (flu and other viruses also cause temporary heart inflammation).
Key Points: Question What are the cardiovascular effects in unselected patients with recent coronavirus disease 2019 (COVID-19)?
Findings: In this cohort study including 100 patients recently recovered from COVID-19 identified from a COVID-19 test center, cardiac magnetic resonance imaging revealed cardiac involvement in 78 patients (78%) and ongoing myocardial inflammation in 60 patients (60%), which was independent of preexisting conditions, severity and overall course of the acute illness, and the time from the original diagnosis.