The United States had to turn to its old rival Russia for help because the mask gap was too big, but Russia rejected the United States because of the serious epidemic. Although India has a good industrial base, India is taking care of itself this time because of its large population and small mask production.
In addition, there are many processing factories in China, so in the price comparison of masks, India has no chance to win. Although medicine and software are developed in India, light industry in India is underdeveloped, and masks in China are cheaper than those in India. So most Indians import from China, and don't produce too much, because the price is not dominant.
But as a tolerant country, if the United States comes to China for help, I believe China will try its best to help.
At the same time, China is also the world's largest producer and exporter of masks, accounting for 50% of the world's annual output and exports. Even though India claims to have a capacity of 16%, it can increase the production of masks. However, even if India wanted to help, there was nothing it could do this time. Even if India supports the United States with all its masks, it is still a drop in the bucket for the United States. Therefore, for the United States, except China, no other country can meet the huge demand for masks in the United States.