PARIS—French Prime Minister Jean Castex said on Thursday that the coronavirus situation in France remained fragile but that for the moment there was no need for a new national lockdown. Castex said the rate of infection had not significantly increased over the past two weeks, even if the pressure on French hospitals remained strong. “We must stick with the current restrictions we already have in place … but the situation today does not justify a new national lockdown,” he told a news conference. Castex acknowledged that many other countries had started their vaccination campaign more quickly than France but he said this was the result of the French government’s decision to begin with the most vulnerable people in retirement homes. While they only make up one percent of the population, he said, they have accounted for nearly a third of the more-than 77,000 COVID-19 deaths since the start of the …