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.
The best thing you can do is forging a not-so-long and not-so-short answer. If you make a long answer without any points, you sound like you are lying. If you make a short one, the analyst part falls in a crack. Also, include FACTS. Something like I've raised productivity by 50% by implementing X technology will give you far better chances of getting the job than I'm good with computers.