How do modern advances in genetic engineering help people with endocrine disorders?

Various medicines can be obtained with the help of bacteria. For example, insulin, which is used to treat diabetes. A gene that is responsible for the production of insulin is inserted into the culture of E. coli with the help of genetic engineering, and E. coli begins to actively produce it. Then, the hormone is collected, purified in special ways, disinfected and offered under the name of recombinant insulin. Many vaccines are made in the same way.