Heterophilic lymphocytes 3.68% is not normal. Heterotypic lymphocyte 3.68% is not normal because the percentage of heterotypic lymphocytes is normally 2% to 3%, and if it exceeds 3%, it suggests an increase in heterotypic lymphocytes. High percentage of heterotypic lymphocytes is usually related to some specific diseases, such as infectious mononucleosis, epidemic hemorrhagic fever, heterotypic lymphocytosis, etc. Some patients have high heterotypic lymphocytes due to allergy to drugs or abnormal reaction during blood transfusion. If the percentage of heterophilic lymphocytes is 3.68%, it is recommended to observe regularly and review the test after one week interval. If the heterophilic lymphocytes continue to rise, the cause should be analyzed under the guidance of professional physicians in a timely manner, and then targeted treatment should be carried out.