Can I apply insect repellent on my 6-month-old? What is a safe brand to use?

Yes. I have been putting on my 6 months old boy daily since he was 5 months old. The area where I stay is a dengue hot spot so to play safe I apply insect repellent on him daily. I recommend California baby bug repellent which is made of organic ingredients. It is safe to apply on babies daily and it is okay even if they accidentally lick it. Moreover, it is very effective. There is no more insect bites on my baby's hands and legs which I have applied the repellent over. I applied on him 2 times a day after bathing him.