That quote is from https://berthub.eu/articles/posts/immune-system/ https://berthub.eu/articles/posts/immune-system/ Could have also seen it via https://jsomer

That quote is from https://berthub.eu/articles/posts/immune-system/ https://berthub.eu/articles/posts/immune-system/ Could have also seen it via https://jsomers.net/i-should-have-loved-biology/ https://jsomers.net/i-should-have-loved-biology/ which quotes it directly