Uganda is set to destroy 400,000 unused coronavirus vaccines, which had been supplied for use in the north of the country.
Most of the unused doses are Moderna and Astrazeneca.
The batches are thought to now be expired, according to Uganda's online paper, Monitor.
It comes as the country has reached less than half of its target to vaccinate 22 million people, the same source said.
"Moderna is ultra-frozen - it has to be thawed. Before use, when it was unutilized in Acholi we took it to western Uganda but couldn't utilise it before 30 days," Uganda's news site Nile Post quotes Health Minister Jane Aceng as saying.
She attributed the low vaccine uptake to unproven health myths, it continued.