12024-07-19T14:45:40+00:00Ivan Portillo741ad6f42573dbb784db9511d4627772eb86aa193675The first genetically engineered vaccine for hepatitis B was developed. This vaccine used recombinant DNA technology, representing a significant advancement in vaccine technology and paving the way for the development of future vaccines.plain2024-07-19T16:42:48+00:001986Ivan Portillo741ad6f42573dbb784db9511d4627772eb86aa19The first genetically engineered vaccine for hepatitis B was developed. This vaccine used recombinant DNA technology, representing a significant advancement in vaccine technology and paving the way for the development of future vaccines.