ModsJava
Block Contagion
Java mod listed for Minecraft 1.21. Downloads from the MC Java Mods app on Android.
Block Contagion turns any block you craft, find, or place into a creeping viral infection that spreads across the terrain until its source is broken!
⬇ Download on Modrinth
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.21.1, 1.21.2, 1.21.3
- 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.
File checked by MCModsHub
- Ships as virusmod-1.0.0.jar — drop this file into the mods folder
- Download size: 36 KB
- Download link checked 16 Oct 2026 — working
These come from our own check of the pack file, not from the source page.