Way too much work and confusion to have two different threads (those who played the video game and those who haven't) so we are going to go with one and if you are reading the thread assume both the TV show AND video game will be spoiled for you.
Meanwhile - here is an interview with Collider where Neil Druckman and Craig Mazin explain they changed how the infection spreads for the TV show
https://collider.com/the-last-of-us-cordyceps-infection-explained-neil-druckmann-craig-mazin-comments/