Why The Rise In Allergies?

A report into how common food allergies are by the  Imperial College London has found that since 2008, the number of people with food allergies in the UK doubled and rates are highest amongst pre-school children so what do they conclude is behind it?  
They considers the role of our immune response which includes the high use of antibiotics in early childhood which has a detrimental effect on our immune system in later life as well as exposure to pollution which can worsen the severity of symptoms.
They are also wondering if the lack of expose to certain foods in early life may be important in determining if we develop an allergy for which they point to Government advice from 2009 about children and pregnant women avoiding exposure to peanuts and eggs which may be linked to the rise in food allergies.
Studies do show that early exposure before the age of five to peanuts and eggs is linked to a reduced likelihood of developing an allergy and the advice was changed in 2019 for anyone concerned with allergies to certain foods to incrementally introduce the food that could cause an allergy to train the immune system although it is strongly suggested this is done under the guidance of a medical team.
The new study also shows that almost a third of people who are at risk of a life-threatening allergic reaction don't own adrenaline autoinjector pens which shows that we really do need to look at the causes and the solutions to allergies in the UK.