CRP and diabetes mellitus: In addition, higher serum CRP and D-Dimer levels were correlated positively with increasing age of COVID-19 patients by the same study. Since diabetes is also associated with increasing risk of COVID-19-associated disease outcomes and mortality [44], altogether, these findings substantiate the overall conclusion drawn from this study that COVID-19 patient groups prone to more severe infection are more likely to develop disease outcomes/mortality and can be identified by elevated levels of CRP and D-dimer and higher viral loads to be classified into a high-risk patient group.