My 6.5 month old has been having really high fever , up to 40C since yesterday . Rang 111 and went to see a GP in a local hospital. Was told she has unspecific viral infection as they couldn't find the cause. Is it normal for them to have continuous high temperature after 24 hours ? I've been alternating calpol and nurofen .. The lowest it has gone down was 37.5 and will shoot up to 40C after 3.5 hours of medication. Other than that she's drinking fine and a little whiny.