Bill Gates criticizes mRNA vaccines after profiting from their development

Bill Gates criticizes injectable, jab-in-the-arm mRNA vaccines after profiting from their development.

Jab-in-the-arm vaccines do not generate mucosal, secretory antibodies which protect surfaces such as the gut and the lungs. Instead they generate the antibody class for the blood. This has been known for decades. See https://www.nature.com/articles/nri1777
Do your own research. openvaers.com is a good place to start.