"The term walking pneumonia is often used to describe pneumonia that isn't severe enough to require bed rest or hospitalization. If you've been told that you have walking pneumonia, it's probably caused by tiny organisms called Mycoplasma." MayoClinic.com
"When physicians diagnose someone with walking pneumonia, they are usually referring to an infection with an organism called Mycoplasma pneumoniae. (Apart from being a pain, mycoplasmas are kind of cool. They are the smallest self-replicating biologic systems known." DrGreene.com
It sucks to get sick on vacation. It sucks worse when it won't go away.