If a food allergy is suspected within an infant, what information is NOT needed?

If a food allergy is suspected in an infant, what information is NOT needed?

a. Whether the infant have been unwell prior to problems arising

b. What laboratory tests confirmed specific allergies

c. Whether any other clan members enjoy food allergies

d. Whether wheat, eggs or peanut butter have be introduced into the infant's diet b)
If previous testing have been done, afterwards all that information is required. What's the point of seeing a specialist if you don't tell them everything? Otherwise they could repeat impossible to tell apart tests and that would be wasting dear time and effort.