This study is a phase 1b clinical trial to investigate the safety and preliminary effects of a single dose of a test drug or placebo to the subjects who has diagnosed as COVID-19 infection.~Study design: prospective, randomized, placebo-controlled, single-blind, single-center
This study is a phase 1b clinical trial to investigate the safety and preliminary effects of a single dose of a test drug or placebo to the subjects who has diagnosed as COVID-19 infection.