By Francesco Guarascio BRUSSELS (Reuters) – The European Commission said that between 60% and 80% of the EU population was estimated to have been infected with COVID-19, as the bloc enters a post-emergency phase in which mass reporting of cases was no longer necessary. In preparing for this less acute phase, European Union governments should ramp up COVID-19 immunisations of children, the bloc’s executive body said, signalling it was considering plans to develop antivirals. “It is estimated that between 60% to 80% of the EU population has by now had COVID,” EU health commissioner Stella Kyriak…