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Question of the day
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Question of the Day (05-Oct-20)

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The decades-old "hygiene hypothesis" holds that early exposure to microbes somehow challenges the immune system and strengthens it against allergies. Studies have shown children exposed to disease-causing microorganisms by older siblings or attending nursery cut their future allergy risk.

Which of the following, if true, would most seriously challenge the conclusion of the studies?
OPTIONS
 
 1)Children in day care usually get more colds and other infections.
 2)Children who grow up on farms are less likely to develop allergies like hay fever and asthma.
 3)Children with frequent chest infections and wheezing had older siblings and had attended nursery in early life.
 4)Children who went to nursery and who had older siblings had greatly reduced the risk of frequent chest infections and wheezing in early life.
 5)In susceptible children, something in their environment triggers infections and allergies.

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