COVID-19, Four Years Later.

On the Clinical Aftermath.

A classic Argentinean tango (Volver, sung by Carlos Gardel) says that twenty years is nothing.
Four is much less.

Figure 1. The Argentine singer Carlos Gardel, Paris, in 1923. Credit: Wikimedia (From Archivo General de la Nación).

As is well known, the pandemic of viral cause (COVID-19) officially debuted in China at the end of 2019, although it could have started before (between…