Remus Lupin was supposed to be on the H.I.V. metaphor. It was someone who had been infected young, who suffered stigma, who had a fear of infecting others, who was terrified he would pass on his condition to his son. And it was a way of examining prejudice, unwarranted prejudice towards a group of people. And also, examining why people might become embittered when they're treated that unfairly.
Dumbledore paused, and although his voice remained light and calm, and he gave no obvious sign of anger, Harry felt a kind of chill emanating from him and noticed that the Dursleys drew very slightly closer together. “You did not do as I asked. You have never treated Harry as a son. He has known nothing but neglect and often cruelty at your hands. The best that can be said is that he has at least escaped the appalling damage you have inflicted upon the unfortunate boy sitting between you.
You are — truly your father’s son, Harry. . . .
He read the letter again, but could not take in any more meaning than he had done the first time and was reduced to staring at the handwriting itself. She had made her g's the same way he did : he searched through the letter for every one of them, and each felt like a friendly little wave glimpsed from behind a veil. The letter was an incredible treasure, proof that Lily Potter had lived, really lived, that her warm hand had once moved across this parchment, tracing ink into these letters, these words, words about him, Harry, her son.
Your great puddin' of a son don' need fattin' anymore Dursley, don't worry
Thing was' he faced them, and Harry was astonished to see that he was grinning, 'they bit of a bit more than they could chew with Gran. Little old witch living alone, they probably think they didn't need to send anyone particularly powerful. Anyway' Neville laughed, 'Dawlish is still in St Mungo's and Gran is on the run. She sent me a letter,' he clapped a hand to the breast pocket of his robes, 'telling me she was proud of me, that I'm my parents' son, and to keep it up
I am sorry too," said Lupin. "Sorry I will never know [my son]... but he will know why I died and I hope he will understand I was trying to make a world in which he could live a happier life.
Brains like that, you could be a Death Eater, son.
I have spied for you and lied for you, put myself in mortal danger for you. Everything was supposed to be to keep Lily Potter’s son safe. Now you tell me you have been raising him like a pig for slaughter —
Her son lives. He has her eyes, precisely her eyes. You remember the shape and color of Lily Evans's eyes, I am sure?