On your show, someone mentioned keeping samples of antibiotics to give out to sick customs agents. This is very bad advice.
Antibiotics are prescription drugs for a reason.
First, they can do much harm, especially if the disease is not caused by a bacteria, i.e., a virus or nutritional problem. Second, the antibiotics must be taken in a full dose, and sample packages usually do not compromise a full dose. If one only takes a sample size, they end up killing some of the bacteria, but not all. The ones left over become antibiotic resistant, which is not only trouble for the customs agent, it's trouble to everyone else who contracts the disease. For an example of the problem, observe what is happening in the prisons of the former Soviet Union.