The phrase "to produce the vaccine" means to create or make the vaccine, which involves developing and manufacturing a substance that can protect people from a specific disease. Full definition
«There's a great amount of infrastructure that exists in producing these vaccines in eggs because that's how it's always been done,» he points out. (scientificamerican.com)
In addition to its emphasis on producing vaccines, the lab specializes in gene and cell therapies, including stem cell products. (news.wisc.edu)
The company that produced this vaccine never admitted to problems. (2ndchance.info)