A reaction to what? I will assume you are referring to a food allergy. Then the answer is yes, just not the allergen.
To be clear, there are many types of over-sensitivities. Most of them are not Allergies, and allergies vary greatly in severity. If you're allergic to bromalin, a kiwi fruit will make your throat feel itchy. A peanut can kill someone allergic to nuts. If you get a tummy ache from bell peppers you're not allergic, just sensitive to bell peppers. Should you eat? Yes. In the middle of a reaction? Well, why not? f you can. I don't think it'll make anything better, but i doubt it'll make it worse and eating tends to be better than not eating.
Yes, a person can have an allergic reaction to camphor. I myself am allergic.
MMR
It depends on the person
If a person is intolerant to something, they should not eat, drink, or be near that thing as it can cause an allergic reaction.
Allergy medications such as Zyrtec or benadryl. This will help ease the symptoms of the allergic reaction.
Allergic reactions depend on a person's immune response and biological reactions. This means that all chemicals has the potential to trigger at least one person's allergic reaction.
No
No, it's a simple molecule, too small to cause an allergic reaction.
yes
Type your answer here... Yes you can get hives if you are allergic to penicillin. Usually, hives are what happens the first time a person displays an allergic reaction to penicillin. The next time a person takes penicillin, the reaction escalates past hives to a much more serious reaction involving difficulty breathing (airways restrict). A penicillin allergic reaction can cause death. People who are allergic to penicillin should wear a medical bracelet or necklace that clearly identifies their allergy.
Only if the person is already allergic to that antigen. Not if they are immune to the antigen. The word antigen refers to the protein that joins with the antibody. If the antibody is of the allergic type (IgE) then an allergic reaction will happen and if the antibody is of the immune type (IgG, IgM or IgA) then there won't be an allergic reaction.
No. You can not spread an allergic skin reaction. You can, however, spread the irritant or chemical that may cause an allergic skin reaction if your clothing or other items have the irritant or chemical in or on them and the person is sensitive or allergic to it. I don't know why you say No, its contagious. if you want Natural remedies for skin allergies please visit www.makehealtheasy.com