More than 100,000 cases have been reported in Shanghai since March in a test of the country's strict zero-Covid policy – Copyright AFP Hector RETAMAL The news coming from Shanghai is all bad and getting worse. The huge lockdown, which has required 26 million people to stay home has become unworkable. Food shortages and food riots are adding pressure to a very difficult situation. Information on Twitter is delivering a running commentary and a repetitive but grim message. 26 million people are under way too much stress and the situation is fragmenting severely into a series of riots, looting and…