Allergies are the result of a hypersensitive immune system. The allergic immune system misidentifies an otherwise innocuous substance as harmful, and then attacks the substance with a ferocity far greater than required.
Laying off an employee is different from firing an employee. Firing means letting a worker go for any reason, whereas a layoff refers to an employment termination based on economics, usually involving more than one worker.
If you were laid off from your job through no fault of your own, you may be eligible for unemployment benefits. However, if you were fired as a result of misconduct or another subjective reason, you cannot claim unemployment benefits.