To me, this is providing more resources to the African population based on genetic differences. The medical establishment could keep those of primarily African decent on the same vaccination schedule as people of European decent. I would guess the majority of of participants in the studies that the current vaccination schedule is based on were of European descent. It's what we do today and it may be exactly right.
Or they could devote extra resources to study a population that has a more robust immunological response. They might find they need A lower dose or perhaps a higher dose or vaccinations at different times or they may find that it doesn't matter. But I don't think it's out of line or at all racist to at least devote those resources to study it.