Millions of people are affected each year by viral infections such as COVID-19, influenza, and RSV, which can cause breathing difficulties and a range of other symptoms. While the respiratory system is primarily impacted, these viruses can also affect other organs—especially in high-risk groups such as young children, older adults, and those with weakened immune systems.

Because these infections share similar symptoms like fever, congestion, and body aches, accurate diagnosis relies on proper testing. Clinical trials are underway to develop faster and more reliable antigen tests, helping improve early detection and enabling quicker responses to respiratory outbreaks.