Viral infections are caused by tiny germs called viruses that invade our bodies and multiply. These viruses can spread from person to person through sneezing, coughing, or touching contaminated surfaces. Common examples of viral infections include the common cold, influenza, and COVID-19. Symptoms often include fever, fatigue, and body aches, which can make us feel unwell. Most viral infections are mild and can be treated with rest, fluids, and over-the-counter medications. However, some viruses can lead to more serious health issues, especially in vulnerable populations like the elderly or those with weakened immune systems. Vaccines are available for certain viral infections, helping to prevent their spread.