A woman shows the COVID-19 vaccination record card at the Universal Studios Hollywood in Los Angeles, California, the United States, June 18, 2021. California has launched a digital platform through which local residents could get access to their COVID-19 vaccine records. (Photos: Xinhua)

A medical worker prepares a dose of COVID-19 vaccine at the Universal Studios Hollywood in Los Angeles, California, the United States, June 18, 2021. California has launched a digital platform through which local residents could get access to their COVID-19 vaccine records.

A medical worker prepares a dose of COVID-19 vaccine at the Universal Studios Hollywood in Los Angeles, California, the United States, June 18, 2021. California has launched a digital platform through which local residents could get access to their COVID-19 vaccine records.