Baggiolini and Dahinden (1994) A study showed that CCL5 was upregulated in COVID-19 patients compared to non-COVID-19 patients. Zhou Y. et al. (2020) Furthermore, patients with T2D were significantly higher in CCL5 levels as compared to the control group. Herder et al. (2006) CCL7 attracts macrophages during inflammation and is found at elevated levels in bronchoalveolar lavage fluid (BALF) from severe COVID-19 patients. Zhou Z. et al., 2020. This evidence concerns the gene CCL5 and type 2 diabetes mellitus.