Survival Sickness

Players may contract any of ten survival illnesses, triggered by weather, hostile mobs, spoiled food, heat in deserts, cold temperatures, insufficient rest, injuries, time spent underwater and related hazards. Each disease moves through stages with its own symptoms, shown on the HUD with disease icons, screen effects and, for some illnesses, cough or sneeze sounds. Diseases can spread between nearby players in multiplayer.

Treatment depends on medicines. Players gather medical ingredients, and the Medicine Mixer workstation turns them into custom medicines. Crystal Salt, a key medical material, comes from smelting Raw Crystal Ore, which generates in the Overworld and in a Deepslate variant. Village chests, shipwreck chests and ruined portal chests also contain ingredients, and a Doctor villager sells medicine trades.

Fabric API is required, and Survival Sickness is client and server, so the server and every player need it. Files exist for Fabric only, for Minecraft 26.2, under the MIT License. The mod is not open source.