Immunization is a complex system, in the past we have used 'dead virus' particles to stimulate the immune system. Now with Covid rampant around the world, mRNA therapy has been the go choice to protect the population from severe outcome. However multiple vaccine shots and booster shots seem to train the human immune system to target specific responses which may lead to lesser immune responses to pathogens other than covid. There is much debate on this subject, there is no doubt the vaccines reduced harmful outcome with the first two variants, however many children who have been not naturally exposed to flu viruses and other health issues seem to have less immune ability to fight seasonal flu.
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