This question already has an answer here:
It was posited in answers/comments to " If a living Horcrux was killed "normally", would they stop being one? " that somehow, Harry is being protected from harm in general (post-GoF) by the fact that - as per HP7 - Voldemort took Harry's blood and thus with his blood took inside him the protection that Lily's sacrifice bestowed on Harry.
However, I think that this protection (both Lily's original protection in Harry's blood, and the part of it that got transferred to Voldemort) is VERY VERY specific and is only against harm done directly by Voldemort. This means that Harry is still subject to non-Voldemort harm, for example he could have been easily killed by Basilisk fang's bite in HP2 or by FiendFyre started by Crabbe in HP7 in Room of Hidden Things.
Is there good in-Universe or JKR information to support or reject my theory that the protection is only against harm directly done by Voldemort?