Cam'ron -- My Ebola Masks May Not Help ... But They're Making Me Money

Cam'ron knows full well his Ebola masks won't really protect you from the disease ... but hey, they're selling like hot cakes!

The rapper was leaving Hooray Henry's Halloween night when he told our photog he's already sold 5,000 masks emblazoned with his punim. He also revealed where he got 'em -- same place you buy other preventative stuff, like condoms.

Everyone knows it's a scam, since Ebola is not an airborne virus, but it's a fun scam nonetheless ... and Cam'ron's now making a killing.

Wrong choice of words?