Infection is displayed with a BossBar Title at the top of your screen, for example:
It does effects every 10 seconds but it allows you to find a cure even when having effects while dying. You are not allowed to consume items(Food, Liquid) while you have infection and you are not allowed to perform most commands whilst infected.
INFECTION TYPES:
NECK - Can be cured by using antibiotics.
LEG & ARM - Can be cured by performing an amputation with a knife.
WATER - Cannot be cured.
BLEEDING - Can be cured by using a bandage.
Amputation
If the infection is in the leg or the arm, if requires the "Knife" to amputate the limb to cure the infection. To use the Knife, Crouch and right click the knife whilst holding it.
This is shown in chat, for example;
Once you use a knife to amputate the infected limb, theres a chance you will need to stop bleeding out with a bandage, or you will bleed out and die. To use the bandage, right click whilst holding it.
If you manage to use a bandage to stop this, you will be cured, and it will be shown in chat like this;
Neck Infections
If you are bitten in the neck, you will need to use antibiotics to cure the infection, or you will die.
To use Antibiotics, right click whilst holding the item. Shown here:
If you manage to use antibiotics to cure the infection, the effects will stop and you will be cured.
Infected Water Bottle
There is a chance to find infected water bottles. These will infect a player when consumed and are not curable. Be cautious when drinking the water!
PREVENTION
In order to prevent infection from Walkers, players can wear iron or diamond armour (Not necessarily a full set of matching armour, can be mix and matched), this is the easiest way to prevent infection from a Walker.
Always be sure to carry enough medical supplies, food and necessary equipment with you at all times.
Goodluck.