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. 2020 Sep 24;24(4):e527–e534. doi: 10.1055/s-0040-1715586

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The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. ( https://creativecommons.org/licenses/by-nc-nd/4.0/ ).

This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License, which permits unrestricted reproduction and distribution, for non-commercial purposes only; and use and reproduction, but not distribution, of adapted material for non-commercial purposes only, provided the original work is properly cited.

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Fig. 1 Severe acute respiratory syndrome coronavirus 2 natural evolution and diagnosis tests. — ∞Viral load in stools detected by polymerase chain reaction (PCR) has an uncertain clinical significance since it could remain detectable for long time periods (not related to disease severity or evolution). The bar is not showed below to avoid possible confusion. ⁴⁹ ≠For pedagogic reasons, the sputum & nasopharyngeal viral load curves “stop” at three weeks, following the natural evolution of the disease and its detection by PCR; however, it could be continuing in cases that progress to moderate, severe, or critical coronavirus disease 2019.