My father has had around 99-100 degree fever for around 8 days now and today he coughed up some blood too. I want to know what could be the possible causes, a family doctor stated that it might be tuberculosis and not covid since my other family members are absolutely fine. He has no other symptoms other that the fever, cough and a bit of chest pain, no loss of smell or taste and no difficulty breathing. I want to know because i live in a different part of the country and my family lives on another rural part and travelling has become very difficult.