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very low dose and then you gradually increase the dose and then you monitor those humans to make sure that there are not
any let's say reactogenicity to what you are giving them at the same time you start to measure what is doing in terms of
immune responses so you do that with multiple vaccines and you do that with multiple doses and you do that with multiple ages of people young people all
Listen to native speakers pronounce “reactogenicity” in real conversational contexts with synchronized timestamps and subtitles.
The condition of being reactogenic