During the COVID-19 infection, all patients had fever (100%), 24 had non-productive cough (77.4%), 15 had gastrointestinal symptoms (48.4%), 17 patients suffered a severe attack, with an oxygen saturation < 94% (54.8%), 26 patients had lymphopenia evident in the complete blood count (83.9%), 22 had a D-dimer > 0.5 mg/L (71%) and 29 (93.6%) of cases had a high CRP. The gene discussed is CRP; the disease is lymphopenia.