What are the solutions prepared from weakened or dead microorganisms, viruses, or toxins that provide some immunity from diseases?
A. Vaccines
B. Histamines
C. Drugs
D. Antibiotics
Answer:A
What are the solutions prepared from weakened or dead microorganisms, viruses, or toxins that provide some immunity from diseases?
A. Vaccines B. Histamines C. Drugs D. Antibiotics