My understanding was there were many different tests being used ... so on what basis are you making that generalised statement.
> When you recover from it, you don't still have it, even if you test positive. //
A plausible explanation for specific tests doesn't make this a universal truth; so presumably you are relying on more information? Also, there being an explanation for positive tests based on dead virus, doesn't mean all post-infection positive tests are due to dead virus; that's a massive assumption.
.. assuming the virus can not hide (and be able to leave) where they can't penetrate - like in the eye ?
.. and with weak immune system the outcome may be (how?)long undecided as the antibodies are not being able to fight the virus fast enough to finish it definitely?