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how do we know this replacement is a lot better and has no side effects?

I don't think we know anything about side effects yet (no clinical trials).

What we do know is that it's able to treat specific infectious cases that nothing else can, so it has unique properties that appear really useful. That means it has the potential to really save lives.

where have you been?
lol.. no wonder you were out of the radar you actually took rest too

I've been focusing my time on growing steemSTEM, so not exactly resting, I just was taking all the time I had free for that and not writing posts.

Rest, what's that?