从申论的角度，这个结论并不正确。
注意看开头：
Indeed, zinc, melatonin, vitamin C, vitamin D, and other supplements have been commonly prescribed from the earliest days of the pandemic.
看结尾：
Based on the science, there is reason to be hopeful that supplements such as vitamin C or D, zinc, or melatonin might help in the fight against COVID-19. While there’s no proof yet that they do, additional research could show a benefit in certain situations, or with a different dose or formulation of the supplement. So it’s worth keeping an open mind.
还有，维C是发烧时常用补充剂。如果你的结论只是“无证据”，那么维C银翘片这种“中成药”就应该消失了。