BANGKOK( REUTERS)-Thailand is in talks with European countries to purchase millions of doses of Covid-19 vaccines, a health official said on Thursday( Aug 26), as the South-east Asian nation tries to speed up its inoculation roll-out to contain a wave of infections. The authorities in Thailand have been scrambling to shore up vaccine supplies, despite the country being the production hub for AstraZeneca shots in the region. Last week, the government said it would borrow 150, 000 AstraZeneca dose