Answer - Bacteria Cause Strep Throat Viruses are the most common cause of a sore throat. However, strep throat is an infection in the throat and tonsils caused by bacteria called group A Streptococcus (group A strep hopes this helps :)
Cystic Fibrosis is a recessive disease. It could most likely skip several generations. If the two people have the disease then were to have children, each child has a 25% chance of being born with the disease.
