Influenza (or as it is commonly known, the flu) is a contagious disease caused by an RNA virus of the orthomyxoviridae family (The orthomyxoviridae is a family of RNA viruses which infect vertebrate). The name comes from the old medical belief in unfavourable astrological influences as the cause of the disease.
Mark as brainliest please, if I don't get brainliest it's ok:)
