This study was conducted on (83) patients who were suffering from COVID-19 or recovered from this virus and attended Al-Numan Hospital / Baghdad city, as well as (83) healthy individuals as a control group during the period from 1st February to 1st November 2020. The results showed that anti-COVID IgM antibodies were higher in the age group (40-59) years 11(45.8%), followed by the age group (20-39) years 9(37.5%), then the age group (> 60) years 3(12.5%), while these antibodies were lower in the age group <20 years 1(4.2%) (P=0.741). Results of anti-COVID IgG antibodies were shown to be highest in the age group 20-39 19(42.2%), followed by the age group (40-59) years 17(37.8%), then the age group > 60 years 11(13.3%) and then the age group < 20 years 7(8.4%), P=0.741. While the results showed that urea and creatinine were elevated in 60 (72.3%) of the patients in comparison with the control group 0(0.0%), and the level of CRP was elevated in 76(91.6%) of patients, P=0.005. Our study revealed that the levels of GOT and GPT increased in 11(13.3%) and 9 (10.8%) of the patients respectively, while the levels of alkaline phosphatase increased in 50(60.2%) of patients P=0.005. The Pearson correlation of GPT (0.417) was significant with CRP, also the Pearson correlation GOT was (0.017) significant with CRP, also alkaline phosphatase was highly significant with CRP 0.697, the renal function group showed highly significant variation when Pearson correlation method was used as it was 0.534 with urea and 0.343 with creatinine respectively.