By testing only during documented influenza activity, the pharmacy aims to improve which aspect of the test's performance?

Testing only during documented influenza activity aims to improve the positive predictive value of the test. The positive predictive value reflects the probability that individuals who test positive for influenza actually have the disease. By restricting testing to times when influenza is actively circulating, the likelihood that a positive test result truly indicates an active infection increases. This is because there are fewer false positives when the prevalence of the disease is high, which in turn enhances the accuracy of the test in identifying true cases.

During periods of low influenza activity, the likelihood of encountering non-influenza illnesses that might cause similar symptoms increases, which could lead to a higher number of false positive results. By focusing on testing when the disease is known to be present, the pharmacy can maximize the benefit of the testing regimen, ensuring that a higher proportion of positive results are valid reflections of true influenza infection. This focus ultimately supports more effective patient management and resource allocation within the healthcare system.