Step-by-step explanation:
Since the strept test came out posutive then it means that the patient had a streptococcal infection. Such a bacteria would affect a persons throat as teh body reacts to it several symptoms such as enlarged tonsils, sore throat and fever would begin to manifest.
This infection would cause the body to respond in such a way that it would antibodies against the disease. This patient did not respond to the treatment against the viral flu when he took tamiflu because he was wrongly diagnosed. the antibody would have a cross reaction with the tissues of the body bringing about inflammations and this causes a heart condition.