Just got back from a Tesco visit. A guy about 10 places in front of me in the entry queue was exhaling visible vapour, but no-one else was. I thought at first he was smoking/vaping, but no. Wonder if he had a fever? Whatever, I was careful to keep well away from him in the shop!Not everyone with Covid-19 has an elevated temperature. And just to be awkward not everyone with a temperature has Covid-19.