No. According to the CDC, because some of the symptoms of COVID-19, Flu, and RSV are similar, it may be hard to tell the difference between them based on symptoms alone, and testing may be needed to help confirm a diagnosis.
Please note: A multiplex test may not detect these viruses in early stages of infection. In addition, the test may not detect the virus if there was a problem with your sample, such as when the sample is not collected and returned as directed or if there was a problem with the test. There is also the possibility of a false negative (a negative result that is incorrect) if you’ve had recent exposure to a virus.