The third World Laureates Forum is on in Shanghai, drawing nearly 140 top scientists worldwide, including winners of Nobel Prize, Turing Award, Fields Medal, Lasker Medical Research Awards and other top scientific awards. CGTN invites Prof. Zhang Wenhong, Nobel laureates and a professor of medicine from University of Oxford, to give his take on how the COVID-19 will pan out globally with winter fast approaching, infectivity of asymptomatic infected persons, and vaccines and medicines.