Half true. Zinc inside the cells inhibits the replication of the virus RNA, and HCQ is one of many zinc ionophores. But HCQ has 3 additional mechanisms of action that are well known: HCQ makes the cells less acidic, making it difficult for the virus to enter the cells. HCQ makes the "factories" in the cells less acidic, slowing down the assembly of the virus. And HCQ modifies the ACE2 receptor so the spike protein of the virus cannot bind to the cells. Some new studies tell us about additional features of HCQ like protecting the blood vessels and the regulation of the immune response, avoiding the cytokine storm that kills the COVID-19 patients in the ICU. That does not mean that doctors should only use HCQ, in the more servere cases they need antioxidants, blood thinners and steroids.