According to the inventor of the vaccine.... mrna vacines are not "sterilizing" vaccines like the ones we all received as children for measles, mumps, rubella, polio etc... mrna is only working on a very narrow area of the cell known as the spike protein, it does not trigger the entire immune system to work to control the virus like dna based vaccines. It is an experimental vaccine and has not been approved by the fda as such. Hopefully, new chemoprophylactic anti viral vaccines, that actually contain the virus, will become available to high risk populations....soon. The mutation trend is troubling to say the least.. anyway, I'm going to bow out and get back to guitar stuff!