Coronavirus is killing more men than women. In its first six weeks almost equal numbers of males and females were infected with the disease, but only 1.7% of the women went on to die, compared with 2.8% of the men. Scientists think they know why: women’s immune systems are stronger than men’s. They’re built that way.

Dr Sharon Moalem, a Canadian-born physician, rare disease specialist and author, has a theory that women are genetically tougher than men. In 2016 Moalem and his wife, Anna, were driving in Toronto. A car ran through a red light and smashed into them. “We rolled,” he recalls. “The cabin, the roof, totally caved in. We were very lucky to be alive. If we hadn’t ducked down, we would probably