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.
Example: The RBS girl who was fired without compensation after a co-worker told their boss about posts she had written on Facebook. Kate Furlong read an article saying RBS would cut 3,500 jobs. In anticipation of being laid off, she updated her status on Facebook and wrote: 'I speak for myself when I say WoOOOO oooo Ooooo HOoooOooOoo, among other things.