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.
Such tactics may amount to constructive dismissal, which is illegal in some jurisdictions. Layoffs and furloughs. Finally, termination of employment can happen as a result of layoffs, also known as downsizing, reduction in force, or redundancy, which are not firings. A laid-off employee's job is terminated and not re-filled, because the company wishes to reduce its size or operations, not for performance-related reasons. In rare cases, laid-off employees are re-hired by their respective companies, though by this time they have usually found new jobs.