A vacuum chamber where engineers assemble coatings that could "read" changes in gene activity in blood for the pre-symptom test is seen at the Duke Institute for Genome Sciences and Policy at Duke University in Durham, N.C. , Thursday, Sept. 10, 2009. AP Photo logo AP Photo 2 months ago

A vacuum chamber where engineers assemble coatings that could "read" changes in gene activity in blood for the pre-symptom test is seen at the Duke Institute for Genome Sciences and Policy at Duke University in Durham, N.C. , Thursday, Sept. 10, 2009.