Sounds like pretty sloppy, old wives, random cultural reasoning to me (for example in other countries people think being cold gives one a cold). > Paediatricia

Sounds like pretty sloppy, old wives, random cultural reasoning to me (for example in other countries people think being cold gives one a cold). > Paediatrician Margareta Blennow says reports from the Swedish Environmental protection agency show conflicting results. "In some studies they found pre-schoolers who spent many hours outside generally - not just for naps - took fewer days off than those who spent most of their time indoors," she says. "In other studies there wasn't a difference." If it isn't backed by some serious data - one probably shouldn't risk one's new born child on something so tenuously supported and specifically in an area which is subject to large random statistical effects and various psychological biases.