Viral vaccines are medical preparations designed to stimulate the immune system to recognize and fight specific viruses. They work by introducing a harmless part of the virus, such as a protein or a weakened form, into the body. This exposure helps the immune system learn to identify and combat the virus if it encounters it in the future. Common examples of viral vaccines include those for influenza, measles, and COVID-19. By receiving these vaccines, individuals can reduce their risk of infection and help protect the wider community through herd immunity. Vaccination is a key strategy in controlling viral outbreaks and preventing disease spread.