Immortuos Calyx

Calyxide – Cures the infection from a player by 40%, withers fully infected individuals. May be lethal in later stages of infection
General Antiparasitic – Cures the infection by 10%, but only if the active infection is below 40%. Gives the player an infection resistance divisor that decays to normal over time. Will cause some internal organ damage
Immortuos eggs – Infects an injected player with the parasite.
Infection scanner – when an entity runs over this tile, if they are infected with the parasite, it gives off a redstone signal, otherwise it disables the redstone signal.
Health scanner – A better, more portable version of the infection scanner, gives the statistics of the target's health precisely.

Infection mechanics:
The infection runs through four general stages, updating by 1% every 450 ticks

Passive: 1-39%, sends a warning message at 10 and 25%, no side effects

Transition: 40-59%, at 40% the parasite stops you from communicating with your friends through chat. You'll emit unnatural noises as you attempt to chat.
At 50% you become contagious. See contagion mechanics for more information.

Active: 60-94% At 60%, you get slowness in hot environments, and speed in cold environments.
At 75%, you will be injured by 2 hearts of damage when you attempt to use calyxide. This increases by 2 hearts every 5% from here on.
At 85%, you get weakness in all environments except cold ones. In a cold environment, you get strength,

Lethal: 95%+ – At 95%, without health boosts, an attempted cure would kill you, as the parasite is too far ingrained. You receive blindness at this point.
100%+ – The infection will begin to kill the host. If it successfully kills the host itself, it will assume direct control with full vitality (Producing an infected human entity)

Contagion mechanics:
Contagion works with a simple math equation. X = contagious player's infection level, Y = target's armor value, Z = resistance divisor.
(X – (Y * 2))/Z – For example, if you have a 75% infection, and your friend has full diamond armor with no additional resistance to the infection
75 – (20*2) = 35, for every hit, your friend would have a 35% chance to be infected.

When you infect a player, a moderate chunk of the parasite you're carrying will leave you to infect the new host. Your infection rate is reduced by 5%.

Fully infected entities have a contagion level of 95, and any other zombie has a contagion level of 20.

Raw foods can also cause infection. It ignores armor value and has a contagion level of 10.