Application of schisandra chinensis and extracts of schisandra chinensis in resisting severe acute respiratory syndrome (SARS) coronavirus infection

The invention provides the application of schisandra chinensis and extracts of the schisandra chinensis in prevention or treatment of a severe acute respiratory syndrome (SARS) coronavirus infection. When the final concentration of the schisandra chinensis is 500 micrograms per milliliter, the inhibition ratio of isolated SARS coronavirus main protease by 95% ethanol extracts of the schisandra chinensis can reach 92%, and the inhibition ratio of the SARS coronavirus main protease by ethyl acetate extracts of the 95% ethanol extracts of the schisandra chinensis is 89.1%.