I thought Zinc had to be part of the therapy. Also that doxycycline could be substituted for the Zpack where there are cardiac or drug interaction problems.
Re: Zinc - according to some, including an FR doc, he considers the zinc to be possibly helpful, and most likely not harmful. His thought is unless you’re zinc deficient, it may not be helpful. But that it doesn’t hurt to use it.
He’s been treating with HCQ and the Z-pack with good results.