Interesting conspiracy theory but, in my view, flawed. First, I'm not a medical doctor, I'm a psychologist. I therefore have no vested interest in pharmaceuticals. I do however know sufficient about virology to feel confident in my original answer .
What troubles me about your comment is that you seem to be suggesting that the whole medical profession - across the globe - is complicit in some massive undertaking with drugs companies to hide a known cure (or to keep it under wraps if it is ever discovered)? I'm afraid I simply can't subscribe to such a perspective and neither, I believe, would most other people.