【明報專訊】Recently, Hong Kong, Guangzhou and Shenzhen have all experienced a new wave of COVID-19 cases caused by viruses coming from abroad. The three cities have adopted different approaches in response to the cases based on their own conditions. Even if they might not be able to imitate each other's responses, they can at least start by sharing virus information and take the opportunity to set up a Greater Bay Area (GBA) pandemic information platform to exchange information so that governments and the public can all stay informed about the situation within and without their territories.