The Food and Drug Administration declared that the Pfizer vaccine is safe and offers strong protection for younger teens based on testing of more than 2,000 US volunteers ages 12 to 15.
Hong Kong is still grappling with coronavirus outbreaks and stringent social distancing measures that are especially hard on bars, restaurants and the tourism industry.
The research, published in the journal Nature Medicine, noted that the vaccine is effective against coronavirus variants carrying the N501Y and E484K mutations.
Bahrain plans to inoculate everyone 18 years and older in the kingdom at 27 different medical facilities, hoping to be able to vaccinate 10,000 people a day.
With northern hemisphere countries hit by a pandemic winter surge, Britain this week became the first Western country to roll out the Pfizer-BioNTech vaccine.
Latest figures on Tuesday showed that the country had recorded a total of 259,600 Covid deaths and 12.5 million cases -- with over 2,000 deaths and 167,000 new cases in just the last 24 hours.