In Australia, it is recommended that children receive immunisation against chicken pox at 18 months and again at 7 years of age - VCE - SSCE Biology - Question 13 - 2007 - Paper 1
Question 13
In Australia, it is recommended that children receive immunisation against chicken pox at 18 months and again at 7 years of age.
The following table gives informati... show full transcript
Worked Solution & Example Answer:In Australia, it is recommended that children receive immunisation against chicken pox at 18 months and again at 7 years of age - VCE - SSCE Biology - Question 13 - 2007 - Paper 1
Step 1
A. 15-month-old child has a defective immune system.
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This option suggests that the immune system is unable to respond to the chicken pox virus, which would typically result in infections appearing in other family members, especially the siblings. Given that the 15-month-old developed the disease after exposure, but no one else did, this claim does not reflect a defective immune system.
Step 2
B. father already had a chicken pox virus in his body.
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There is no available information regarding the father's immunological history or whether he had previously contracted chicken pox. Thus, we cannot reasonably conclude that he had the virus in his body.
Step 3
C. 2-week-old baby had naturally acquired chicken pox antibodies.
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This statement is plausible, as the mother, who had chicken pox at age 5, could pass some antibodies to her exclusively breast-fed infant. However, the infant is too young to show signs of immunity against the virus.
Step 4
D. 4-year-old child had previously received an injection of chicken pox antibodies.
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Since it is specifically mentioned that the first child was immunised at 18 months, this option is accurate, as it is likely that the antibodies from the vaccine help protect the child from the infection.
