The COVID-19 pandemic has spread to all 54 countries in Africa. As of Sunday, more than 500 confirmed cases and 21 deaths have been reported in Tanzania. CGTN has invited veteran experts from Jiangsu Province who worked on the front line in Hubei Province to share their first-hand COVID-19 treatment experience with their Tanzanian counterparts.

Answering a question about how symptoms evolve from mild to critical cases, Dr. Huang Hanpeng gave three ways to diagnose the stage of symptoms.