Global health 'passports' met with caution

International travel health certificates to show that a person has been vaccinated against COVID-19 are being rolled out or discussed by many governments around the world to help restart economies and cross-border travel.

However, the potential for discrimination, theft of health information or fraud is among experts' concerns.

On Monday, China officially kicked off a mini program, backed by the social media app WeChat, that enables subscribers to obtain a Chinese version of an international travel health certificate, allowing people-to-people exchanges to resume in a safe and orderly way.