It does include everything. It's the narrative that comes from the few negative results, as well as the big Lancet article that was retracted that got the news

It does include everything. It's the narrative that comes from the few negative results, as well as the big Lancet article that was retracted that got the news very negative. But if you know of missing studies please add them. The disagreement of effectiveness is mostly about it being used in a late stage of the disease (as mentioned), not in early stage.