Introduction
A COVID-19 catastrophic infection crisis, driven by the new coronavirus SARS-CoV-2, has presented a grave threat around the world. Bangladesh has also been affected by this viral infection(1). The World Health Organization labeled it a pandemic based to its parabolic spread in 213 nations (2). The disease is spread mostly through direct contact with infected patients’ airborne droplets(3). To minimize the spread of disease, rapid recognition and accurate diagnosis have become critical. Several samples, such as nasopharyngeal or oropharyngeal swabs, nasopharyngeal or oropharyngeal aspirates or washes, bronchoalveolar lavage, phlegm, tracheal swab and blood, are collected from potential SARS-CoV-2 patients. The microbiological diagnosis is confirmed using the polymerase chain reaction (PCR)(4). SARS-CoV-2 RNA virus load in the upper airways was considerably higher throughout the first week and culminated at 4-6 days following onset of symptoms, when it could be sampled. In COVID-19 individuals, the sensitivity of nasopharyngeal scrapes was higher than that of oropharyngeal sweeps(5). But even though the research on COVID-19 is inconclusive, lower respiratory tract tissues include the highest viral loads in individuals with severe acute respiratory syndrome (SARS) and Middle East respiratory disease (MERS)(6, 7). Nucleic acid screening for severe acute respiratory syndrome coronavirus 2 had also detected benign patients with coronavirus infection (SARS-CoV-2)(8).In this report, we have presented a case of persistent COVID-19 negative report of physician in Bangladesh living and visiting in Red listed country.