What is the current knowledge on the topic?
COVID-19, an acute respiratory infection caused by SARS-CoV-2, has been
declared as a pandemic by the World Health Organization. Several
repurposed drugs are being evaluated but currently there are no robustly
validated treatment or preventative medicines or regimens. Nitazoxanide
has shown in vitro activity against SARS-CoV-2, influenza and
several other animal and human RNA viruses.