DH upstairs we've all had mild (ish - low grade fevers and persistent coughs) CV symptoms - he's the last but with a much higher temp. He's on day 5/6 and on 39 after paracetamol. How high is too high in adult and when do you start to ask for help in keeping him safe? He was a mild asthmatic as a child but nothing of note since we've been married. Worried that it's all of a sudden spiked.