On the invitation of China's Ministry of Foreign Affairs and National Health Commission, country's top respiratory expert Zhong Nanshan marks China's Youth Day on May 4 by engaging in a video conference with Chinese students studying abroad and staff from the Confucius Institute. The expert answers questions about the pandemic.

As of May 3, confirmed COVID-19 cases hit 3.4 million globally, with the death toll surpassing 243,000 and more than one million patients recovered, according to the statistics released by Johns Hopkins University.