Used for quantifying thymidine kinase (TK) enzyme activity in human serum or plasma samples, this ELISA kit supports the monitoring of cell proliferation in clinical settings. It is particularly useful in oncology for assessing tumor burden and treatment response in cancers such as lymphoma and leukemia. Elevated TK activity correlates with increased cellular turnover, making it a valuable biomarker for disease progression. The assay enables high-throughput, sensitive detection, allowing for early diagnosis and timely adjustment of therapy. It is also applied in research studies investigating antiviral treatments, as TK levels can reflect immune activation.