What Is Frank Sick With on 'The Last of Us' in Episode 3?

The tender love story at the heart of Episode 3 of 'The Last of Us' is beautiful, but what is Frank sick with in those final scenes?

Frank, The Last of Us Wiki

THE LAST OF US Episode 3 Veers Drastically From the Game, and It's the Best - Nerdist

The Last Of Us: Murray Bartlett Partner Emotional Over Role

The Last of Us Show Creators Explain Why They Made Big Changes to Bill and Frank's Story - IGN

On HBO's The Last of Us Episode 8, there's a fate worse than death.

The Cast of 'The Last Of Us': Everything to Know

The Last of Us Episode 3 hailed 'one of the greatest TV episodes EVER

The Last Of Us Episode 3 Recap: The Ballad Of Bill And Frank

Frank, The Last of Us Wiki