Since late 2019, the new coronavirus SARS-CoV-2 has posed a variety of health risks around the world. A increasing body of research implies that long-term impacts are common and potent, in addition to the complicated presentation that can affect numerous physiological systems. The international scientific community continues to publish varied discoveries relating to SARS-CoV-2 infections; nevertheless, the basic assumptions in these studies are so dissimilar that it’s difficult to compare the results. To build robust and reliable Long COVID studies that accurately record the results of long-term outcomes, general explanations are needed. “Long COVID,” “COVID-19 syndrome (PACS),” and “post-acute sequelae of SARS-CoV-2 (PASC) infection” are just a few of the diseases’ names. We look at the definitions that have been utilised in the literature to date and compare them to data from electronic health records and patient information collected throughout the study. Long COVID, which comes on the heels of the outbreak, has the potential to generate a second public health issue. A concerted effort to investigate and reduce this risk requires concerted efforts to find the cause of this unusual condition.