Should you be concerned? A virus is a submicroscopic infectious agent that replicates only inside the living cells of an organism. Thus, viruses cannot multiply but must be replicated by the cells that they invade. Viruses can infect all types of life forms, from animals and plants to microorganisms, including bacteria and archaea. Coronaviruses are a large family of viruses that are common in humans and many different species of animals, including camels, cattle, cats,