Health: Sterilization is a training manual found in the chapter "The University".
Overview[]
Obtaining this manual improves the amount of health a health kits that Joel can create restores; they will replenish 67% of the player's health on use.
Location[]
On the school grounds, there will be a large open plaza with a fountain surrounded by several buildings. In the building on the right of the fountain, climb the stairs until a large, open window is visible. Vault out onto the roof, and enter the adjacent room from another open window. This manual will be found in the counter.