About 5% of the worldwide population uses a medication that has to be kept in the fridge at all times (diabetes, arthritis, Crohn's Disease, growth hormones, etc). This makes it very difficult for these patients to travel. And the important side-effect of this is that people using these medications often do not take them to work with them, because they would have to put their medication in the office fridge for every one to know that they suffer from multiple sclerosis or some other horrible disease.