<unk>  occurs when<unk>  infections cause myocarditis with a resulting thickening of the myocardium and dilation of the ventricles. These viruses include Coxsackie B and adenovirus, echoviruses, influenza H1N1, Epstein-Barr virus, rubella (German measles virus), varicella (chickenpox virus), mumps, measles, parvoviruses, yellow fever, dengue fever, polio, rabies and the viruses that cause hepatitis A and C, as well as COVID-19, which has been seen to cause this in persons otherwise thought to have a "low risk" of the virus's effects. In the case of COVID-19, not only can myocarditis arise from it, but it has also been observed to occur in rare cases following immunization against it. In July 2021, the European Medicines Agency's safety committee recommended that myocarditis and pericarditis be added as side effects of the Pfizer vaccine and Moderna vaccine, and in October 2021, a few countries have limited or halted the use of the latter as a prevention.
Viral cardiomyopathy
Amyloid cardiomyopathy
Alcoholic cardiomyopathy
Coxsackievirus-induced cardiomyopathy
HIV associated cardiomyopathy
Diabetic cardiomyopathy
Dilated cardiomyopathy
Eosinophilic myocarditis