There are concerns that the European Union's vaccine passport programme could exclude people who have been given a version of the AstraZeneca coronavirus vaccine that was made in India.
The head of the African Union's vaccine delivery programme, Dr Ayoade Alakija, told the BBC's Focus on Africa programme that she hoped the EU exclusion was an administrative error.
She however says she was concerned that what it feels like here is there's a two-tier vaccine system.
The EU is set to introduce its Digital Covid Certificate on Thursday, but only four vaccines have been approved for inclusion.