The herbal medicine containing extracts of an ancient plant long used in Asia to ward off virus infection by bolstering immunity is seeing surging demands and the attention of health authorities in the region.

Moderate-intensity exercise, rest, warm salt-water gargle, breathing moist air to relief congestion are generally recommended, along with chicken soup or ginger tea to relief congestion symptoms. Cough drops or throat lozenges can be added to the regimen to sooth coughing and sore throat.