A study by Wolszczak‐Biedrzycka et al. [23], which analysed serum samples of 100 COVID‐19 patients in comparison with 50 healthy controls, confirmed the release of cytokines in COVID‐19 patients by revealing that COVID‐19 patients had elevated concentrations of some cytokines (IL‐1ra, IL‐2ra, IL‐6 and IL‐8), which can serve as potential SARS‐CoV‐2 biomarkers compared to asymptomatic patients. This evidence concerns the gene CXCL8 and COVID-19.