Dr. Nguyen Thi Thanh Hoa from the National Hospital of Endocrinology in Hanoi said latest surveys show that iodine coverage has dropped to 46 percent from more than 90 percent in 2005, when a national program to boost iodine supply in daily meals was in full effect. Hoa said a simple way that many countries maintain proper iodine coverage among the population is to add it in daily seasonings like salt, but when the Vietnamese national iodine program ended in 2005, it really ended.