My mom is a cardiac patient (having diabetes too) . She is currently having cough since yesterday. Cough is not quite frequent though, thrice a day or so. But when it starts, it persists for around 30 seconds or so. There is no sputum with it. And no other symptoms of covid e.g. fever, weakness or flu-like feeling, shortness of breath etc. Should she Immediately go for covid test? Please suggest.