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RE: To Vaccinate OR Not To Vaccinate
Actually, vaccinated individuals carry the diseases too, and they shed. This means that they can give an unvaccinated person the disease. Remember, not everyone reacts to the vaccination, every second person rejects it, and the vaccine also wears off after time (so adults are actually no longer regarded as immune) - making them susceptible to contracting the disease from those who have recently received the vaccine.
Not really vaccinated people are carriers. Most of the vaccines works the way that a few cells of disease is vaccinated into body. This activates production of immunoglobulin (antibodies) to fight disease and completely destroy it. And again vaccines that not require revaccination lasts till you die. Actually there are a lot of vaccines like tick-borne encephalitis that needs to be repeated every 3-5 years