What was the purpose of the practice of variolation?

Norman-McKay 2nd Edition
Ch. 14 - Biomedical Applications: Vaccines, Diagnostics, Therapeutics, and Molecular Method
Problem 7What caused thousands of parents in the United States and the United Kingdom to stop vaccinating their children after 1998?
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Key Concepts
The 1998 Wakefield Study
Vaccine Hesitancy and Public Perception
Impact of Misinformation on Public Health
How does an antibody neutralize a virus?
a. By preventing the virus from binding to a receptor protein on a host cell
b. By preventing the virus from injecting its nucleic acid into its host cell
c. By degrading the capsid
d. By inserting holes into the viral envelope
e. By preventing the virus from replicating while inside the host
Select the true statements about mRNA vaccines. Select all that apply.
a. These vaccines contain a type of nucleic acid
b. These vaccines can alter cellular DNA
c. These vaccines often require a booster dose
d. These vaccines do not require adjuvants
e. These vaccines require an engineered virus to deliver the mRNA to a target cell
Is there a definitive scientific link between autism and vaccines? Support your response with information from the text.
Match the pathogen part to the inactivated vaccine:
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A direct ELISA test is utilized as a pregnancy test because it tests for:
a. Antibodies to the fetus in urine
b. Antibodies to a pregnancy hormone in urine
c. An antigen that recognizes a pregnancy hormone in urine
d. T cells that recognize a pregnancy hormone in urine
e. The presence of a pregnancy hormone in urine