1) Babies are always at high risk of infection because they lack any sort of specific immune response in their first year

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1) Babies are always at high risk of infection because they lack any sort of specific immune response in their first year. True or false?

a) True. The specific immune system has to be exposed to a few things to develop, and this takes some time.

b)False. Babies acquire antibodies from their mother in the womb and also from the earliest breast milk.

c)True. The thymus does not mature to produce functional T cells for about the first year .

d)False. Babies have a fully functional specific immune system from birth and can fight of disease as well as an adult.

e)True. Babies put so much energy into growth in their first year that their immune system simply doesn't have the energy to function for a year or so.

 

2) What are the four stages of emergence of a new infectious disease?

a)Transmission , infection , exposure , epidemic

b) Infections , transmission , exposure , epidemic

c)Exposure , infection, transmission , epidemic

d)Exposure , transmission , infection , epidemic

e) Transmission , exposureinfection , epidemic

 

3) What is an example of a type of organism which is always harmful to a cell?

a)A bacterium

b)An antibiotic

c)A fungus

d)A virus