Minepathy

Minepathy adds a disease system to Minecraft. Diseases are generated procedurally, and each one receives its own effects, name, appearance and transmission mode. A player who contracts a disease first goes through an asymptomatic period of about 30 seconds, after which the disease continues with a set chance. Once symptoms begin, health drops by 10 at intervals of 30 seconds until it reaches 0, unless the player recovers. Each disease has a strength percentage that sets the chance of a health decrease. Contracted diseases can also mutate and spread further.

Transmission depends on the mode a disease was generated with. Some spread through interaction with blocks players touch, some through close proximity, and some through food items. Certain hostile humanoid mobs can spawn carrying a disease, and a smaller share of animal mobs spawn with a visible indicator. Hazmat suits protect a wearing player from contracting or spreading diseases, and a suit can be obtained by killing a humanoid mob that wears one, though it is likely torn. Torn suits can be repaired by crafting with string.

Minepathy requires Fabric API and Zine. It is client and server and is published for Fabric only, with 1.1.1 for 1.21.11 as the latest file, under All rights reserved. It is not open source.