Extensive Loss of Health at Six Months in Survivors of COVID-19

ABSTRACT

[...]the impact of SARS-CoV-2 variant strains and widespread vaccination on long-term symptoms remains to be elucidated. [...]with high-dimensional data sets, the number of features can exceed the number of observations, thus increasing the risk for confounding. Since this will burden an already stretched healthcare system further, additional studies are needed urgently to help inform future health system planning.