The once-in-a-century coronavirus pandemic is continuing its rampage, threatening to destroy everything in its path. The world is learning a harsh lesson, about the need for cooperation. Guarding against and defusing even the smallest danger are vital for human society. Global public health management needs to be improved. This is a task the world's people must undertake as a matter of the utmost urgency. Here's the fifth episode of the six-episode documentary "Together Against COVID-19."