👉 In the field of medicine, an antiviral is a medication that targets and inhibits the viral replication or entry into cells. It is used to treat infections caused by viruses such as COVID-19. Antivirals are often prescribed to patients with symptoms like fever, chills, fatigue, sore throat, cough, and difficulty breathing. They work by neutralizing the virus's ability to replicate and infect cells in the body, helping to prevent further spread of the infection.