Prior to his fascination with TB,
Green was a young adult novelist and a YouTuber. After the success of his novel
The Fault in Our Stars and the growth of his YouTube community, he found himself with a large public platform (what he calls a megaphone). He worries about drowning out other, more important voices or angering people with his thoughts. Though he tried to get rid of the megaphone, it was tied to his job, so he found something useful to do with it. Green began publicly talking about the TB crisis, advocating in front of the U.S. Congress and enacting positive change in the state of TB treatment.