In order to study properly, you need a group taking nothing, a group taking only Zinc, a group taking only Hydro, a group taking only the Z-Pac, plus every possible combination of two or all three of those. You would need studies using newer patients, patients already in distress, and critical patients if possible.
Why do I get the feeling the main problem is that a correct study has never been done?!
You mean the main problem is hydroxychloroquine is a cure for coronavirus but the the experts are lying to us?
Because they have a stake in remsdesivir or a vaccine?