Friends with a lovely, sensible mum at the primary school where DS goes. This morning she told me they'd got there early because her DS had been coughing all night. I gently suggested that perhaps she should get him tested and she said it was fine because her other son had had a cold the previous week. I pointed out that Covid seems to present differently all over the place and it might be worth checking. But I didn't do anything else. She's lovely, has been one of the more cautious parents at the school and is generally sensible but I can't help feeling she's got this one wrong and I don't know if I should do something. And if I should - what? The boy has gone into school today.