Viral respiratory infections are illnesses caused by viruses that affect the respiratory system, including the nose, throat, and lungs. Common examples include the common cold, influenza, and COVID-19. These infections can spread easily through droplets when an infected person coughs or sneezes, and they often lead to symptoms like coughing, sneezing, sore throat, and fever. Most viral respiratory infections are mild and resolve on their own, but some can lead to more serious complications, especially in vulnerable populations like the elderly or those with underlying health conditions. Treatment typically focuses on relieving symptoms, as antibiotics are ineffective against viruses.