Answer:
Vaccines prevent the spread of contagious, dangerous, and deadly diseases. These include measles, polio, mumps, chicken pox, whooping cough, diphtheria, and HPV. The first vaccine discovered was the smallpox vaccine. Smallpox was a deadly illness.
A vaccine activates our immune system without making us sick. Many dangerous infectious diseases can be prevented in this simple and effective way. A vaccine activates our immune system without making us sick.
Vaccines contain weakened or inactive parts of a particular organism (antigen) that triggers an immune response within the body. Newer vaccines contain the blueprint for producing antigens rather than the antigen itself.
Explanation:
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Answer:
<h2>B. Farming communities had little to no electricity, while cities increasingly depended on it.</h2>
Explanation:
The city had more electricity, for sure. The advanced technology was first develop to cities, where industrialisation came first. Farms also had machines to help the labor, but the main power always was given by human hand.
I'd choose dark, inaccessible, and comfortless. The other words don't really pin down the tone ("draperies"? "General"?).
