Name for me the three most, and three least common food allergies.

"I recently took Food Safety Level II through my employer and understand that the three most common food allergies are cow's milk, eggs, and tree nuts. We did not touch a lot on the least common, but I believe they would be particular fruits, anything sesame based, and highly processed foods such as hot dogs or marshmallows."

"I think that the most common food allergies would be nuts, shellfish, and wheat. For least common, I have reactions to avocados which is rare. Also, I think corn and dried fruits are likely on the lower end of the allergens list, but probably important ones to note. I do understand how vital it is to be aware of cross-contamination when it comes to serving and preparing foods."