subunit vaccines. Instead of injecting a whole pathogen, only subunits, or in other words, certain parts (antigens) of the pathogen, are used so they can more easily be recognized by T and B Cells—which is a very secure way of vaccinating, as it massively decreases the likelihood of an adverse reaction to the pathogen. (This is because sometimes it is not the pathogen directly who causes harm but their metabolic products, which is a nice way of saying “bacteria poop.”)
