I have some experience and medicine about this disease. 1) Virus Myocardiodise(bing4 du2 xing4 xin1 ji1 yan2) only last 3 months. 2) If now your father feels the extra heart beat (zao3 bo2), it is side effect. He should take the medicine to control irregular heart beat. 3) Virus Myocardiodise patient will not be more sensitive to the virus than others. Please give me your tel number. I can call you and discuss that with you. I also have some medicine..