Contagious Effects
A Minecraft Fabric mod that enables status effects to spread between nearby players. Features configurable range, cooldowns, player state filtering, and…
⬇ Download on ModrinthContagious Effects
A Minecraft Fabric mod that enables status effects to spread between nearby players.
Overview
Contagious Effects adds a new layer of interaction to multiplayer Minecraft by allowing potion effects to propagate between players within a configurable range. When a player carries a status effect, nearby players have a chance to contract the same effect, simulating a form of proximity-based transmission.
Features
- Configurable Range: Set the distance over which effects can spread (default: 2 blocks)
- Spread Intervals: Control how frequently the mod checks for effect transmission (default: every 10 ticks)
- Cooldown System: Prevent constant re-application with a configurable cooldown period
- Smart Overwriting: Option to only replace existing effects if the incoming effect is stronger or longer-lasting
- Player State Filtering: Automatically exclude spectators and creative mode players from both spreading and receiving effects
- In-game Configuration: Full integration with ModMenu and Cloth Config for easy adjustment of all settings
Configuration Options
| Option | Default | Description |
|---|---|---|
| Range | 2.0 blocks | Maximum distance for effect transmission |
| Scan Interval | 10 ticks | Frequency of effect spread checks |
| Cooldown | 20 ticks | Minimum time between re-application of the same effect |
| Stronger Only | false | Only apply effects if they are stronger than existing ones |
| Ignore Spectators | true | Exclude spectators from the effect system |
| Ignore Creative | false | Exclude creative mode players from the effect system |
Compatibility
- Minecraft: 1.21.11
- Fabric Loader: >= 0.18.4
- Java: >= 21
License
This project is released under the CC0 1.0 Universal license.
If you have questions join my Discord: https://discord.gg/jMKb3VxSmZ
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.21.11
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Ships as contagious-effects-1.0.0.jar — drop this file into the mods folder
- Download size: 26 KB
- Download link checked 22 Aug 2026 — working
These come from our own check of the pack file, not from the source page.