A study by the CDC reported that only 73% of children in some areas of the United States are being adequately vaccinated. Several million children are at high risk for infections. a. Name some factors that account for this trend. b. Explain how the reduction in vaccination impacts herd immunity.

True adaptive immunity, involving the production of a largenumber of diverse antigen receptors, first evolved ina. amphibians. c. jawed vertebrates.b. invertebrates. d. mammals.

What beneficial role do fevers play in immunity? The height of a fever has nothing to do with the severity of the disease. True False What causes most fevers? What are some of the symptoms that may indicate a need to be concerned about a fever? What role can antibiotics & vaccinations play in relation to a fever? What did a study with lizards suggest about using aspirin to treat a fever? What role can a chiropractor play in treating fevers? Do you believe that chiropractic could be a successful treatment for natural ailments such as fever, stress, & headaches? Yes No Sometimes Explain your choice above:

Which of the following correctly states theorder of events in humoral immunity? Let1 = antigen display,2 = antibody secretion,3 = secretion of interleukin,4 = clonal selection, and5 = endocytosis of an antigen.a. 3–4–1–5–2b. 5–3–1–2–4c. 3–5–1–4–2d. 5–3–1–4–2e. 5–1–3–4–2

For question with blanks, choose the combination of answers that most accurately completes the statement.Widespread immunity that protects the population from the spread of disease is called a. seropositivity b. cross-reactivity c. epidemic prophylaxis d. herd immunity

Vaccines are used to train our adaptive immune system. With live-attenuated vaccines, a weakened form of the pathogen is injected. Describe the steps of an adaptive immune response to this type of vaccine (1 sentence per step). Explain how the immune system of a person who received the vaccine would respond to a later exposure to the pathogen (1-2 sentences).

The type of immunity that develops from deliberate exposure to antigens called immunizations is called: a. None of the above b. Artificial c. Innate d. Natural

Which of the following are two hallmarks of the adaptive immune system? a. Immediate and Broad b. Specificity and Memory c. Innate and Short d. Non-specific and Fast e. Immediate and Passive

Some individuals are immune-compromised because their bodies do not make enough T-cells. What is the difference between a T-cell and any other cell type in the body?       a.   T-cells have different genomes than cells of other types       b.   T-cells have different genes than cells of other types       c.   T-cells have different proteins than cells of other types

Why are most unimmunized children protected against diseases such as measles?Choose one: A.  They lack the host cells for viral replication. B.  They are protected by herd immunity. C.  They have developed immunity toward the measles virus. D.  They still have circulating maternal antibodies.