Knowing More Matters

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Is it COVID-19, RSV,
or the Flu?

About Respiratory Illnesses: COVID-19, RSV infection, and influenza


While impacting people of all ages, the viruses causing COVID-19, RSV disease, and the flu render the following populations especially vulnerable: children, the elderly, those who are immunocompromised, and people with underlying conditions. Coughing, sneezing, and potential contact with virus-contaminated surfaces all contribute to virus spread.

                      Look for these Symptoms

Often spiking during the winter season, COVID-19, RSV disease and the flu are contagious respiratory illnesses that share many of the same symptoms. The three illnesses could possibly seasonally surge, posing a triple threat to you and your family. Here’s how symptoms overlap:

Gantt Chart

 Solution: Multiplex Test

As we face respiratory season, clarity in distinguishing between respiratory illnesses is paramount. A PCR multiplex test will empower your provider to detect and differentiate between COVID-19, Flu A, Flu B, and RSV with a single nasal swab. PCRplus multiplex tests are designed for COVID-19 detection and broader coverage for variants.

4plex plus

Time to results and intended use environment may vary, refer to individual test package insert for details.

  1. COVID-19 – Centers for Disease Control and Prevention (January 4, 2022). Symptoms of COVID-19, “Watch for Symptoms.” Retrieved from: ncov/symptoms-testing/symptoms.html
  2. RSV – Centers for Disease Control and Prevention (January 4, 2022). Symptoms and Care, “Symptoms.” Retrieved from:
  3. Flu – Centers for Disease Control and Prevention (January 4, 2022). Flu Symptoms & Complications, “Flu Symptoms.” Retrieved from: symptoms.htm
  4. Centers for Disease Control (October 20, 2022). Covid Data Tracker Weekly Review. Retrieved from:
  5. Centers for Disease Control and Prevention (December 18, 2020). Respiratory Syncytial Virus Infection (RSV), Trends and Surveillance. Retrieved from: research/us-surveillance.html
  6. Centers for Disease Control and Prevention (October 1, 2021). Estimated Flu-Related Illnesses, Medical visits, Hospitalizations, and Deaths in the United States — 2019–2020 Flu Season. Retrieved from: html#estimates

For more information about COVID-19, RSV and flu, please visit For use under an Emergency Use Authorization in the United States