Touring with caution: Visitors posing in the garden of Doi Tung Royal Villa in Chiang Rai, Thailand. — AFP AS one of the most tourism-dependent countries in the world, Thailand is eyeing plans for vaccine passports and quarantine waivers as the global Covid-19 inoculation drive gathers pace. Prime Minister Prayut Chan-o-cha this week ordered officials to look into vaccine certificates for international travel after signalling the nation is open to scrapping the two-week quarantine for inoculated visitors. The local tourism industry wants mandatory quarantines to be lifted from as early as July 1 so it can open to potentially millions of vaccinated tourists.