Directories provide an easy way to arrange information so that it will be further easier to search and retrieve any required information at a later point of time. Further, one is free to make any number of directories or sub-directories as he/she wishes and store the data accordingly, the only benchmark being the easiness to refer back or search and find out the required file with minimum fuss.
When you read this, you must realize that you are already in a sub-directory under the main directory - Health - and at the doorsteps of further more sub-directories. Please go ahead and find out the information you came looking for. You won't be disappointed at what you could find inside!