Prime Minister Prayut Chan-o-cha refused to assign blame to individuals or state agencies for recent vaccination cancellations.

Speaking to reporters at parliament on Monday, Gen Prayut said, "I'm not blaming anyone. Others may not have the same understanding of the issue because information is being passed through too many channels."

The prime minister said he has instructed the Centre for Covid-19 Situation Administration (CCSA) to emphasise his desire to balance current stocks according to demand and urgency.

He also said he wanted to see appointment numbers aligned more closely with the concept of demand so fewer people would have their appointments cancelled or be turned away.

"We may have the capacity to administer 100,000 doses in a single day. But where are the vaccines for appointments on other days?" he said.

Gen Prayut said he did not expect any more significant hiccups.

"If any such problems still exist, [we will] do some fine-tuning," he added.

The premier reiterated that supplies are received in batches throughout the month, and that the amounts are not uniform.

"From now on, the appointments will be organised based on the vaccines that arrive in each batch," he said.

His remarks were made after many hospitals in Bangkok, both privately run and state-owned, announced they had suspended appointments this week because they ran out of supplies.

Gen Prayut, meanwhile, said those who booked from the provinces via the Mor Prom application will be given priority because they made their appointments well in advance and may have made travel plans.

Certain amounts of vaccines being administered at more than 100 vaccination points in Bangkok are outside the quota allocated to City Hall, the prime minister said.