well my whole family basically has Fifth disease which is a virus that most of the time gotten by children and symptoms are hive like rash and fever . In adults if not in absolute health they get joint pain and nausea . So apparently I might have had it but the hives part and no fever or joint pain that I recall . yesterday Makishi ( my little brother ) had this hives thing and fever so mom took him to children 's ER around 3 - 4 so then now my mom has it with the joint pain and nausea she was like freakin ' dying !

Question: How might the entire family com to have the Fifth disease ?
Answer: Someone must have had it first and then transmitted of the rest of the family .Someone must have had it first and then rest of the family got it elsewhere .The entirety of the family must have gotten it somewhere independently .Someone must have had a genetic disorder and then transmitted of the rest of the family .