Suddenly from yesterday afternoon my mother started feeling uneasy and when I checked her template it was 99.4 .she took paracetamol and there was no fever that day but she started couching.Today morng also she was coughing and her body temperature was more when checked i.e 100. Already she was infected with corona in April 21. What could be the possible reason of having fever and cough suddenly.sometimes back she was having heachache. What all tests we should do to know the reason for the same.Please suggest