A method of identifying altered biomarker expression levels in a human serum specimen to diagnose asthma or non-small celled lung cancers in humans. The existence of asthma or non-small celled lung cancers in a patient can be determined by subjecting a blood sample from the patient to a simple blood test to determine the expression levels of certain specific biomarkers. The expression levels of the specific biomarkers are compared to ranges of expression levels for the same biomarkers which are indicative of individuals known to have asthma, non-small cell lung cancers, or neither. Comparing the expression levels will determine the existence or non-existence of asthma or non-small cell lung cancer.
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