The recommendations are a U-turn from 2000, when the American Academy of Pediatrics issued guidelines that children should put off having milk until age 1, eggs until 2 and peanuts, shellfish, tree nuts and fish until 3.

WSJ: Food Allergy Advice for Parents: Start Peanuts, Eggs and More Sooner

Small-scale manufacturing activity features the processing of peanuts, fish, and hides.

FORBES: Gambia

But allergies to peanuts, nuts, shellfish and fish tend to be lifelong, she said.

CNN: 'Allergic Girl' teaches how to eat out with allergies

Since 2006, food manufacturers have been required to clearly label products that contain any of the most common allergens -- milk, eggs, fish, shellfish, peanuts, tree nuts, wheat and soy -- but some allergy experts say the labels should be more explicit.

CNN: The story

Common causes include foods such as peanuts, tree nuts, sesame, fish, shellfish, dairy products and eggs.

BBC: Jo Swinson MP recovers from allergic reaction