The government insists it will be ready to launch a large-scale Covid-19 vaccination programme as promised from early June using AstraZeneca's vaccine.

Speaking after meeting with AstraZeneca representatives on Tuesday, Public Health Minister Anutin Charnvirakul wanted to allay any fears over the company's readiness to deliver on its promise.

The deputy prime minister said AstraZeneca had given him updated information and that discussions had been very positive.

He did not specify the exact date the company would deliver its first vaccine batch to the ministry but said the company would provide further deliveries every month.

"What we can say right now is that the company will be able to send its vaccine continuously every month," Mr Anutin said. "The amount will be based on discussions between the company and the Department of Disease Control (DDC).

"We can't say the exact date we will get our first delivery from the company but we are confident that it will be ready by June 7."

Talks between AstraZeneca representatives and Mr Anutin were held on Tuesday amid scepticism the company would be able to fulfil the ministry's orders after many hospitals were forced to cancel appointments citing a shortage of vaccines.

The British-Swedish company has so far sent about 100,000 vaccine doses to satisfy a special government request made in February, when the country was facing a surge of infections.

AstraZeneca on Tuesday confirmed to the Bangkok Post it would be able to provide its vaccine to Thailand next month.

A company representative also told the Post its new supply chain for Thailand was nearing completion and would serve an important role in maintaining continuous supplies to Thailand and Southeast Asia.