>>4463278
I don't know what broad spectrum treatment of a patient would be, but there is a constellation of interactions between any particular host and any particular potential pathogen that determines the outcome of the encounter.
Vaccination just addresses one: humoral immunity. However, within that strategy, the host itself individually responds to the components of the vaccine and that outcome may be positive or negative for the host depending upon many factors. So maybe that is what you mean by broad spectrum treatment - one vaccine for all unique individuals.
Maybe you opt out of an unnecessary vaccine like for HPV or chickenpox, but what about tetanus which still kills worldwide (~300,000 annually; https://www.who.int/immunization/diseases/tetanus/en/).
Or what about rabies (100% mortality) if needed? Or polio? Smallpox was eradicated worldwide through mass vaccination and has not appeared since 1977 and will not likely again unless released from a lab where it is stored. The upsurge in pertussis in the US has been due to avoidance of the vaccine. Well, pertussis vaccine is not to protect adults but infants who come into contact with - mostly - adults with pertussis.
Then there is the very useful practice called herd immunity, which operates at the scale of public health.
The vax debate is very complex - including moral issues such as the use of cells from aborted human babies to produce components - and to my mind requires long, detailed, careful thought and analysis of verifiable facts to reach an individual conclusion for a course of action/non-action. I support all who are trying to find their way through the quandary.