Infants in a pram should be well wrapped up to protect them from hypothermia, as babies lose heat faster than adults because their skin is particularly thin, according to health experts. The ratio of body volume to body size also precipitates a baby’s loss of heat, Germany’s Das Sichere Haus health initiative says. On top of that, a baby that is simply lying in a pram without moving hardly produces any body heat. If the child is dressed too lightly, the risk of hypothermia arises after just 60 minutes at temperatures of around 6 degrees Celsius. Parents who want to go for a winter’s walk shoul…