Leviticus 11-15
The next eleven chapters of Leviticus deal with all sorts of laws. Many of the laws discussed in these chapters relate to clean and unclean animals (ch.11)health issues, health issues such as childbirth, leprosy and bodily discharges (ch.12-15) murder (killing anything even animals without sacrificial purpose was considered the same as murder) (ch. 17).others to moral issues, (ch. 18, 19). Remember that Israel is a new nation and the establishment of law is essential to their survival. Therefore, God, through Moses, delivered the law to the people. Chapter 20 covers some of the penalties for breaking the law. These were also important to serve as deterrents for the people, encouraging them to live by God's standards.

Foods Permitted and Forbidden (ch. 11:1-22)
The rationale for the distinctions between clean and unclean animals has been the subject of speculation. One suggestion is that unclean animals include those whose locomotion is improper or irregular, like the bat, which is a mammal that flies. Fish without fins are unclean (Lev. 11:10), as are animals that "creep" on the ground (11:41). I have also heard the opinion that the unclean rationale is based on what the animals eat (hogs eat slop, shrimp and lobster are both scavengers and eat off the bottom of the ocean as do some fresh fish, such as catfish). Thus it would appear that there could also be health related reasoning behind some of the laws.

Unclean Animals (11:23-47)

The Ritual After Childbirth (chapter 12)

The Law Concerning Leprosy (13:1-46)
The Law Concerning Leprous Garments (13:47-59)
Both of these laws were established to protect the uninfected from the infected person or their belongings. Since this disease could be transferred from one person to the other through a live virus on the clothing or belongings of the infected person, there were very strict laws concerning the disease. At certain stages of the disease, the person was ordered to be quarantined (13:45).

The Ritual for Cleansing Healed Lepers (14:1-32)
The Law Concerning Leprous Houses (14:33-57)

The Law Concerning Bodily Discharges (15:1-33)
These laws were established to make sure that diseases were not carried from one person or one home to another. Isn't it interesting that God has established these things to protect his people from bodily fluids that could possible contaminate and spread through the people. Such diseases have wiped out thousands throughout history (black plague for instance) and look at the devastating affects of aids, which is a disease spread by bodily fluids.
It seems to me that if the world turned back to God and obeyed his laws which were established for the protection of His people, we would be much better off.
I of course am not referring the laws concern sacrifices, our final sacrifice was complete with the death of Christ. But, the practical laws concerning health issues, the way we treat each other and so many of the laws that were established for the well-being of the nation as a whole. Through studying these laws I have been able to see how many of our present day laws have evolved directly from what God passed down to Moses. What a blessing that God loved us enough to help our forefathers establish laws to govern us, with an open eye to the sin problem of man. I am grateful for the men and women who enforce the law and protect us from those who will not obey the law.