- Differentiating between RSV, flu, COVID-19, and the common cold can be difficult since symptoms often overlap.
- Flu typically has a sudden, severe onset—symptoms appear quickly and intensely in both adults and children.
- RSV and common colds usually develop more gradually, starting with mild symptoms like a scratchy throat or runny nose.
- COVID-19 is unpredictable; some individuals experience gastrointestinal symptoms, while others have respiratory issues.
- Testing is the only reliable way to distinguish between these viruses, especially for COVID-19, which requires isolation measures.
- RSV generally requires supportive care—hydration, rest, and monitoring—since most people recover without complications.
Differences between RSV, the Flu, COVID-19 or a Cold
It can be challenging to determine whether an illness is RSV, the flu, a cold, or COVID-19. However, understanding the differences between them can help you choose the best way to care for your child.
Susanne Tanski MD, MPH, Pediatrics
