What Was the Result of the Antibiotics and Vaccines Created

Multiple Choice

What was the result of the antibiotics and vaccines created in the 1960s and 70s?

A) People immediately noticed them as causing autism in infants when administered.
B) Previous to that era people had been attempting to treat bacteria and viruses with herbal remedies but such treatments often proved ineffective.
C) Bacteria and viruses have been completely wiped out and no longer exist on this planet.
D) They banished the major infectious diseases from the United States, leading to complacency, but over the past two decades infectious disease has returned to the United States with a vengeance.