Don't be too concerned. If he is walking when you hold his hand and around the furniture, it is just that he is lacking a bit of confidence in letting go and doing it on his own. My daughter got really sick at 12 months old, just as she was starting to take a few unaided steps, and became really weak. She got better, but didn't start walking until 14 months of age. My little was also a late walker. She was 14.5 months old, and my little brother was 15 months. Don't worry, he will get there, then there will be no stopping him, and you will wish you could go back to the days where he would just sit still!!!!
Mother of 3, Qld