This study aims to evaluate the nature of the spread of the COVID delta virus through 49 to control it, invent a portable device to distinguish it from other flu viruses and propose a chemical drug. A combination of a level of cobalamin, thiamine, folic acid, lipoic acid, Fe, and Zn played a major role in the COVID delta propagation. Whenever the ratio of chronic diseases in a country did not exceed 30% of different diseases, this indicates the COVID delta virus spreading was due to a decrease in Zn level than normal. The most common non-chronic diseases that were related to the spread of the...