Contagious Effects
A Minecraft Fabric mod that enables status effects to spread between nearby players. Features configurable range, cooldowns, player state filtering, and in-game configuration via ModMenu.
About this Mod
Contagious 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.
Available Versions
How to Install Contagious Effects on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set fabric Loader
In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.11).
Install Mod
Open the mod browser in the dashboard and search for "Contagious Effects". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.11
Server-side
✓ RequiredRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Contagious Effects server crashes on startup – what to do?
Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.11). You can switch loaders with one click in the panel.
Is Contagious Effects compatible with fabric?
Contagious Effects officially supports fabric for Minecraft 1.21.11. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Contagious Effects – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Contagious Effects consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.
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Rent Modded Server
Install Contagious Effects with just one click on your server.