Thailand approves 8 specific vaccines for foreign visitors Thailand has approved a list of eight Covid-19 vaccine-makers, including Sinovac Biotech Ltd. and Pfizer Inc., for foreign visitors seeking to shorten a mandatory quarantine on arrival, reports Bloomberg. Visitors to Thailand will need to upload copies of the vaccination certificates on the website of the nationâs Foreign Ministry prior to arrival to reduce the quarantine period to seven days. Those without vaccinations will still need to undergo 10 days of isolation and visitors from countries including South Africa will be subject to two-week quarantine. The list of approved vaccine-makers are Sinovac, AstraZeneca Plc, SK Bioscience Co. Ltd., Pfizer, BioNTech SE, Serum Institute of India, Johnson & Johnson, Moderna Inc. and Sinopharm Group Co.