Portuguese Prime Minister Antonio Costa went into self-isolation on Thursday, a day after meeting with French President Emmanuel Macron, who has tested positive for Covid-19, his office said. It said Costa has shown no symptoms and underwent a test for the virus Thursday morning. He will remain in quarantine until health authorities can determine "his level of risk". The prime minister, who attended a lunch with Macron in Paris on Wednesday, has cancelled all immediate events on his calendar. These include visits from Friday to Sao Tome and Principe and to Guinea-Bissau, two former Portuguese colonies in Africa, the office said in a statement. bcr/pz/wdb/gd