Covax urged governments Thursday to consider equally all people inoculated with WHO-approved products to avoid creating a two-tiered travel and trade regime.
Covax spoke out after an EU-wide Covid certificate for easier travel took effect that recognises four vaccines but not others, notably the Covishield version of AstraZeneca's jab which is widely used in Africa.
The European Medicines Agency has authorised vaccines produced by Pfizer/BioNTech, Moderna, AstraZeneca and Johnson & Johnson.
But the European Medicines Agency estimates that differences in how Covishield is manufactured in India prevent it from qualifying for an EU seal of approval.