Re: Persistent cough

hi, Your son needs a lot of sunshine and vitamin D3. If your son stays in the building too long, he may get chronic cough, which is very difficult to cure by any medicine. But it can be cured very quickly if he take a lot of high quality vitamin D3. Take 10000 IU to 20000 IU daily or take two softgel of Doctor's Best or Sports Research 5000 IU vitamin D3 one to two times daily( For adult, it will be 10000 IU to 50000 IU daily). It may cure your cough very quickly. I have used this method to cure myself, my college roommate and my mother's more-than-10-years chronic cough very successfully. You can try it. It is very safe. Good Luck! Tweet