【明報專訊】Hong Kong's zero infection streak, which it has maintained for 16 days in a row, has come to an end. A young person working as part of the airport ground crew has been diagnosed with the L452R mutant variant. The COVID-19 virus keeps mutating, and some variants have particularly high degrees of transmissibility. This is the first case of COVID-19 infection involving the L452R variant in Hong Kong. The authorities must conduct virus detection and tracing adequately to strictly prevent outbreaks in the community.