The family Coronaviridae consists of a group of viruses known for their crown-like appearance under a microscope. These viruses can infect a variety of animals, including humans, and are responsible for respiratory illnesses. The most well-known members of this family include SARS-CoV, MERS-CoV, and SARS-CoV-2, which causes COVID-19. Coronaviruses are characterized by their single-stranded RNA genome and are classified into four main genera: Alpha, Beta, Gamma, and Delta. They can spread through respiratory droplets and surfaces, making them highly contagious. Understanding Coronaviridae is crucial for developing vaccines and treatments to combat infections.