The graph gives the number of varicella (chicken pox) cases between 1972 and 2011. Varicella is an Infectious disease caused by a virus. The disease causes rash, itching, and fever in patients. The varicella vaccine was introduced in 1995. What can you conclude about the vaccine? Vancella (Chickenpox) Cases 1972-2011 250 000 + 200 000+ The vancella vaccine was introduced in 1995 150.000 Cases of Varicella 100 000 + - cases of vancella 50 000 + 1967) 13 [0366 0961 1998] 1991 L000 2001] 20021 2003 20041 20051 2007 2001 20097 20107 Year A. It was successful in eradicating chicken pox from the United States. B. It had no effect on the rate of chicken pox cases in the United States C. It caused a 10% decrease in the number of chicken pox cases in the United States from 1995 to 2011 D. It initially caused a large drop in Chicken pox cases in the United States and the rate continues to decrease​
