This is highly contested and no credible evidence has been produced for these claims. Israeli propagandists have been hard at work conjuring up lies wholesale and it's shameful to repeat them without verification.
What makes you think they're still doing it? IDF/Netanyahu saying it without any credible evidence?
Also, what kind of logic justifies attacking a hospital which definitely has victims of Israel's own relentless attack, on the off chance that the hospital might have terrorists?