US law would withdraw the emergency authorization for the vaccination if there is an existing treatment. Thus, the CDC is dragging it’s heals and stonewalling the use of this an HCQ. Too much money to be made on the vaccine.
From the FDA page - https://www.fda.gov/regulatory-information/search-fda-guidance-documents/emergency-use-authorization-medical-products-and-related-authorities
"Section 564, as amended by PAHPRA (Pandemic and All-Hazards Preparedness Reauthorization Act of 2013), permits the Commissioner to authorize the emergency use of an unapproved medical product or an unapproved use of an approved medical product for certain emergency circumstances (discussed in section III.A of this guidance) after the HHS Secretary has made a declaration of emergency or threat justifying emergency use. The Commissioner may issue an EUA to allow an MCM to be used in an emergency to diagnose, treat, or prevent serious or life-threatening diseases or conditions caused by a CBRN agent when there are no adequate, approved, and available alternatives. Section III of this guidance addresses EUAs"