Description:
Microscope Plague Lab transforms Minecraft into a disease-management survival experience. Every player can contract a procedurally generated infection with a unique molecular code, symptom set, strength level (1–6), and a specific antibiotic weakness. Diseases spread between players and mobs, apply debilitating status effects, and can mutate. Your job is to diagnose, treat, and immunize — or protect yourself entirely with hazmat gear.
Diseases discovered and named by players enter a shared world library and can begin circulating naturally, creating a living, evolving epidemic ecosystem across your world.
| Content | Description |
|---|---|
| Cotton Swab | Samples you, other players, mobs, or Hazmat Researchers to assign or read a disease |
| Microscope (block) | Interactive UI for diagnosing active diseases |
| Disease Sample | Craftable item to procedurally generate a new infection |
| Antibiotic Alpha / Beta / Gamma | Three cures, each effective against one molecular weakness type |
| Hazmat Helmet / Chestplate / Leggings / Boots | Full armor set that prevents catching and transmitting diseases |
| Hazmat Researcher (NPC) | Naturally spawning villager-like entity wearing protective gear and carrying a sealed disease |
You can catch a disease through several routes:
When infected, the disease name appears on your action bar. Depending on disease strength, you will suffer escalating status effects: slowness, weakness, nausea, hunger, blindness, mining fatigue, and at maximum strength, strong poison.
After diagnosing your infection at the Microscope, you are given the option to name the disease (up to 28 characters). Named diseases are saved to the world disease library (holds up to 40 entries) and begin circulating — other players can catch your named disease through normal transmission and world exposure. A server-wide message announces every new named discovery.
Hazmat Researchers spawn naturally in village biomes, wandering in sealed protective gear. They always carry a disease but cannot infect others due to their containment. Use a Cotton Swab on a Researcher to safely sample their disease and study its details at the Microscope — no risk of catching it. You can also use a Hazmat Researcher Spawn Egg to place one manually.




















Each procedurally generated disease has four fixed properties:
| Property | Details |
|---|---|
| Name | Auto-generated (e.g. Viro-347, Myco-812) or player-named |
| Molecular Code | Unique identifier string (e.g. A-3-spiral-2) |
| Symptoms | Three drawn from: chills, coughing, fatigue, fever, dizziness, muscle ache, blurred vision, migraine, stomach cramps, shaking hands |
| Strength | 1–6; determines severity of applied effects |
| Weakness | Alpha, Beta, or Gamma — only the matching antibiotic cures it |
Strength scales from mild debuffs (slowness, weakness) at low levels up to nausea, hunger, blindness, mining fatigue, and strong poison at high strength.
The Microscope UI compares your disease's molecular structure against each antibiotic's known lattice pattern to identify the correct treatment:
| Antibiotic | Structure |
|---|---|
| Alpha | △-CH3 red triangular lattice |
| Beta | ◎-OH blue ring lattice |
| Gamma | N≡N purple helix chain |
Wearing the complete set (all four pieces) grants full immunity to both catching diseases from others and transmitting your own. Any missing piece breaks the protection. The armor is enchantable and has durability comparable to iron-tier equipment.
Using the wrong antibiotic or certain potions on an active infection does not simply fail — it can mutate the disease, changing its strength or other properties. Always confirm the correct antibiotic type at the Microscope before treating.
Curing a disease with the correct antibiotic permanently stores that disease's molecular code in your immunity list. You can accumulate immunity to up to 80 distinct strains. Immune players cannot be re-infected by a known strain even through direct transmission.
Early game: Gather wool and a stick to craft Cotton Swabs immediately. Smelt some iron and copper to craft a Microscope as soon as possible — never take an antibiotic without checking the Microscope first.
Mid game: Locate Hazmat Researchers in villages to safely harvest disease data. Build up antibiotic stockpiles of all three types so you can treat infections quickly once identified.
Late game: Craft the full Hazmat armor set to work in infected areas or assist infected teammates freely. Systematically discover, name, and immunize yourself against as many strains as possible to become effectively immune to the world's circulating diseases.
Multiplayer tip: In a server setting, named diseases spread globally. Coordinate with other players to identify and catalog outbreaks, share antibiotic crafting responsibilities, and quarantine heavily infected players using hazmat gear until they are cured.
Download the mod and follow the step-by-step installation guide.
This mod is licensed under the CreativeMode Mods License.