Anyone infected with COVID-19 may be seriously ill, but the proportion is high or low. My colleague's son is in excellent health. He works out every day, and after he got COVID-19, he became seriously ill. You have supraventricular tachycardia, and the probability of serious illness after COVID-19 infection may be higher than that of normal people. That's all. I hope I can help you. There are many people infected with COVID-19 now, so please pay attention to protection.