Question

The introduction of vaccines to the United States helped-

A) improve the hygiene of medical procedures
B) limit the spread of infectious diseases
C) improve the quality of the water supply Black lung
D) limit the risk in consuming imported produce

Answer 1

B

Step-by-step explanation:

Answer 2

The answer is B

Step-by-step explanation:

if you think about it vaccines had been helping us fight against dieseases.