First of all, I'm not anti-vax. When there's an approved vaccine for coronavirus, I'll get it myself, and urge everyone I know to do the same.
Second, let's think for a few seconds how this technology would actually work in practice.
The technology is a method which allows you to put a few bits of information into the skin. Presumably it's permanent, non-user-visible and non-user-removable.
From there it's protocol design. Option (a), you could store the data of which vaccines directly on the person. Option (b), you could store some kind of ID number to an online database.
We can have a fine flamewar over the merits and drawbacks of Option (a) vs Option (b). But I think it's safe to assume there's maybe a 50% chance they'll end up going with Option (b).
This is pretty worrying. You state the fact it'll presumably only be deployed in Africa, but this is not reassuring. In African countries, it seems like it happens frequently that the government decides this week, it's your tribe's turn for genocide. In this case you'd want to make a run for it, escape your tribe's normal haunts where the death squads will be out in force.
Of course you could sneak across a border, or openly walk into a foreign customs post and ask for asylum, but changing countries has its own set of risks and problems.
An alternative survival strategy would be to simply destroy your identifying documents, if you ever had any, and try to blend in somewhere else. If your identifying document's a non-removable tattoo, you can't do this.