The serological results showed that 38.9% (68/175) and 37.7% (66/175) of the study population had positive IgM+IgA and IgG antibodies against COVID-19, respectively; 51.5% (35/68) of the IgM+IgA candidates and 34.8% (23/66) of the IgG seropositive candidates had chronic diseases. The gene discussed is CD40LG; the disease is COVID-19.