When children are young their immune systems aren't as strong as our are. They are more likely to get sick with colds and other illnesses than most adults are. If you think your child is getting sick more than other kids his age you should contact his pediatrician to see his opinion on it.
one year old children are very frisk and these children will not sit any where keeping hygenic movements,they will chew whatever gets intheir hands ,go to some corners of the house ,sniff cloths so naturally they get cold