It's after Christmas but I just came across this article.
Baby Jesus had hypothermia
Lying naked in a manger in a Northern Hemisphere winter meant baby Jesus would have certainly suffered from hypothermia, say Australian researchers.
They arrived at this conclusion based on the Old Masters who were in attendance at the Birth (it just wasn't recorded in the Gospels. Remember Leonardo Di Vinci was there for the Last Supper and Comicus was in the background - behind Jesus. "We ordered a portrait.")