Consider these vaccinations: MMR, DPT and SARS-2 coronavirus (COVID-19). What diseases does each cover? What type of org

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Consider these vaccinations: MMR, DPT and SARS-2 coronavirus(COVID-19).
What diseases does each cover? What type of organism is each.How consider the basic principle of the vaccine in how it works;What does each one inject into the patient to cause the patient tomount an immune reaction?
The primary immune response is essentially non-existent becausea needle is used to pierce the skin and inject something into thebody...WHAT type of thing is injected for each vaccine. Please donot list the specific molecule, just a description of the iteminjected.
What is the primary white blood cell responsible forresponding?
Is the response humoral or cell-mediated, and why?
Which cell or immunoglobulin type is activated first, then whichis the primary major response?