Just reread chapter 427 and while Wahl never says what has happened to Laxus's organs he heavily implies that no human could survive it.
@senseikeleon Even with special lungs and treatment Laxus seemingly still had a lethal level of poison in him. Not to mention that the anti-magic properties of the should impede magic based resistance and treatment.
Well ya know just because someone takes in a lethal amount of something doesn’t mean they are 100% guaranteed to die especially if they are being treated for said illness it’s likely they would survive
Plus The thunder god tribe also took in lethal amounts of the particles but yet after taking the same treatment as laxus they were cured but it’s just laxus took in a lot more particles as he himself stated due to his lungs being special so he could do that by inhaling a lot more
So it’s safe to say that the medicine that laxus took likely also played a role in keeping him alive as well
And yea it’s true whal implied that a human couldn’t survive that many particles for that long
but he also implied that something that wasn’t human could survive
And ya know what that’s exactly what Dragon slayers are they aren’t regular humans there like semi humans because ya know dragon slayers physically aren’t fully human there organs are more like that of a dragon as it’s stated in chapter 1 that dragon slayers magic physically enchant them with the physical aspects of a dragon such as a dragons lungs or a dragons claws or a dragons scales there body’s physically change to that of a dragons
And that’s why Gajeel has stated multiple times that his actual organs are made of iron and that’s due to dragon slayer magic physically turning him Into a dragon and laxus stated that his lungs aren’t like a regular wizards lungs and that’s due to them being a dragon slayers
Also the particles don’t impede magic based resistance
All the particles do is cause illness by draining a person of there magic to 0 it’s not like they are actually poised or anything it’s just a virus that drains their magic so if a wizard has a large amount of magic power or fairy heart for example they would be Abel to survive a lot longer due to having a large amount of magic power or having infinite magic
So that’s why laxus was Abel to survive the particles because for one he isn’t fully human and he has treatment for said illness as well as having a large amount of magic power