Subunit vaccine

These vaccines contain only specific parts of a pathogen, often proteins or polysaccharides, rather than the entire microorganism. By introducing just the essential components (subunits) of the pathogen to the immune system, these vaccines can stimulate a protective immune response without using the whole organism. This means there's no risk of the vaccine causing disease in the vaccinated person. Examples include the Hepatitis B vaccine and the RTS,S/AS01 malaria vaccine.