Disease

Diseases are really long potion effects that have a negative effect on the Player. There are many diffrent types of diseases, but one of the many popular ones are the Common Cold, Cholera, Heart Attack, etc. They are so powerful, that they will prevent the Player from doing many actions. They can be healed with certain food items, but some also require sleep for the effect to wear off more quicker. Every 5 seconds the time of the effect will increase unless the Player uses diffrent food items to wear it off. The Player will have germ-like swirls around them. And another Player can get that disease if they are 5-6 Blocks near them when in Multiplayer mode.

Description
Diseases will affect the Player from doing any activities such as mining, combat, crafting, etc. Diseases can come from certain food items, certain areas, and certain mobs. Diseases can be healed instantly or by a little bit of time, using food, sleep, and other sources.

Sources for Causing

 * Uncooked Porkchops, Beef, or Chicken: Will have a rare chance of giving the Player a random disease of any type.
 * Some mobs can give diseases when they attack.
 * Rotten Flesh: Will always give the Player a random disease of any type.
 * If a player is close to them about 5-6 blocks near a player with a disease.
 * The /effect command.

Sources For Healing

 * Honey:  Will decrease the Common Cold, and Sore Throat's effect time by 3 Hours back.
 * Melon: Will decrease the Cholera's effect time by 30 minutes back.
 * Chicken Soup: Will just about close to stop the Common Cold, and Sore Throat's effect time.