What is coronavirus? Coronaviruses are a family of viruses that affect animals. Occasionally, coronaviruses have been known to move from animals to humans. The coronavirus we’re talking about today is a new virus, which causes an illness called COVID-19. Our COVID Q&A with Watson is an AI-powered chatbot that addresses consumers' questions and concerns about COVID-19. It's built on the IBM Watson Ads Builder platform, which utilizes Watson Natural.