Definition: In this task, you need to generate an appropriate title for the given summary of some paragraph. The generated title must be short and should include the main topic of the given text. Your summary should be less than 20 words long.
Input: Introducing Covid status certificates to help reopen society risks discriminating against some groups, the UK equality watchdog has warned.

Covid-19: Vaccine passports could create 'two-tier society', equality watchdog warns