The COVID-19 pandemic has probably been the worst public health calamity of the 21st century. At the first peak of infection during the early to mid- 2020s, much was unknown about the pathophysiology, COVID-19 phenotypes, pharmacologic and supportive management, rehabilitation, and outcomes. With precision and celerity, several safe and effective vaccine prototypes were developed to achieve the desired herd immunity and reduce intensive care unit admission and death. Scales have also been design...