even though results are mostly available too late
or lacked specificity and sensitivity .
Until recently , conventional culture techniques and immunofluorecence assays were considered the gold standard for the detection of respiratory viruses , even though results are mostly available too late or lacked specificity and sensitivity .
Until recently , conventional culture techniques and immunofluorecence assays were considered the gold standard for the detection of respiratory viruses , even though results are mostly available too late or lacked specificity and sensitivity .