De Carvalho, Joao Gabriel, and Kateryna Hvozdara. “What Are the Clinical Implications of a Positive RT-PCR Test 6 Months After a Mild SARS-CoV-2 Infection?”. European Journal of Case Reports in Internal Medicine, vol. 8, no. 4, Apr. 2021, https://doi.org/10.12890/2021_002463.