It is a protein synthesized by the liver.35 In a study, it was stated that low albumin levels are an indicator of the patient’s poor diet, which also reduces the body’s immune response, and nutritional deficiencies often weaken the host’s immune response to RNA virus infection.36 Examining 78 COVID-19 patients, Liu et al.37 found that the serum albumin level was significantly lower in the critical patient group compared to the clinically stable patient group. Here, ALB is linked to COVID-19.