"Regional programmes in China and India have demonstrated success with DEC salt interventions at the programmatic level. DEC-fortified salt was used extensively in China, both alone and in combination with mass drug administration. China previously had the largest number of people with lymphatic filariasis, and hundreds of millions were living in endemic areas. Each province in China used different combinations of interventions, but more than 194 000 000 people used DEC-fortified salt; in some provinces it was the principal intervention. In 1994, all provinces in China had reached the criteria for basic elimination of filariasis, and according to national experts DEC-fortified salt played a critical part."