How Many People Are Now Infected by Acquired Immune Deficiency

How many people are now infected by acquired immune deficiency syndrome (AIDS) , and what is the forecast?

A) Twenty million people are infected; however, the number is decreasing because of effective antibiotic treatments.
B) Forty million people are infected, and climbing.
C) Forty million people are infected; however, the number is decreasing because of effective antibiotic treatments.
D) Forty million people are infected; however, the number is decreasing because of an effective vaccination campaign.