Which of the following is true about measles and chicken pox?
Athey are both caused by bacteria.
Bthey are both caused by a virus.
Cthey have been eliminated worldwide.
Dthey are not harmful if contracted during childhood.
Athey are both caused by bacteria.
Bthey are both caused by a virus.
Cthey have been eliminated worldwide.
Dthey are not harmful if contracted during childhood.