Please answer how do u no difference between flu and myocarditis how common is fatal myocarditis in uk ?

Too rare to worry: This is at least the fourth time you have asked about this very rare medical condition, and you have had reassuring replies or agreement from several HealthTap doctors. You're obviously obsessed with it. The main problem here is one of mental health. Please discuss this with your primary care doctor, or consider professional counseling. I suggest it from compassion, not criticism. Good luck.