Coronaviruses are a family of viruses that can cause illnesses such as the common cold, SARS, and MERS. The new coronavirus disease, called COVID-19, is caused by the SARS-CoV-2 virus. Common signs and symptoms include respiratory symptoms, fever, and cough, and in severe cases it can cause pneumonia, kidney failure, and even death. Prevention tips include washing hands frequently, avoiding touching the face, practicing social distancing, and seeing a doctor if symptoms develop after possible exposure.