Could this just be a quality control issue? Walmart uses the SMART Health Cards standard defined by the Vaccination Credential Initiative, which means the digital vaccine record can be safely and privately shared with other compatible services if someone chooses, following all HIPAA privacy guidelines.
Millions of people were administered this batch and could be turned away at EU border crossings when the batch number of their vaccines is checked.
Despite the uproar about travel restrictions linked to the jab, there is no indication that the Indian manufactured dose is dangerous or substandard.