It has been shown that the opportunistic pathogen B. Contaminans (the main microorganism in the respiratory tract of critically ill COVID-19 patients) was associated with higher levels of circulating hypersensitive C-reactive protein (hs-CRP) and IL-6 and lower total lymphocyte counts, CD3 + T, and CD4 + T counts. The gene discussed is IL6; the disease is COVID-19.