So how exactly did he get it? Though we can’t be 100% sure, I think he got it while riding through the crank tunnel. He couldn’t have contracted it during the 6 months of planning the Gladers took to rescue Minho, because he would’ve showed symptoms by then. Though once again we don’t know exactly how he got The Flare, we can be practically 100% sure that he got it on his treck to Denver. I’m sure you all already know this but Newt and the others went to Denver to save Minho. What did they have to save Minho from? WCKD. And who put him there? Teresa. So in a kind of complicated way, it’s Teresa’s fault that Newt died. To elaborate on that, when Gally, Thomas, Newt, and Teresa are running through the stairs of WCKD to save Minho, Teresa sees Newt coughing. I don’t know if she knew that he had The Flare, but after working with it for so long, I can only assume she knew. She watches Newt cough and then her light up as she proceeds to look at Thomas. The previous night, Teresa and Thomas talk about Brenda and why she hadn’t turned yet when Teresa was removing his tag. Teresa had put it together that Thomas has cured Brenda when he told her about her last treatment, The Right Arm. Teresa knew right then and there that Thomas was a cure, but took a tissue with his blood on it to be sure. Going to back to what that has to do with Newt, Teresa knew Thomas could’ve cured him while in the stair well. She sees Newt cough with The Flare, and you can see her eyes light up as she looks at Thomas in The Death Cure movie. She knew Tommy could’ve saved Newt and said NOTHING. And I hate her even more for it. I know she saved Thomas, but her ends never justified the means in my opinion. Here’s the other half, as promise. Thank you for tuning in to my TedTalk.