Can the nucleic acid test be positive before coming back from a trip to Macao?

According to the relevant information, you can't pass the exam until you come back from your trip to Macao. This disease is highly contagious in novel coronavirus, and it will be spread through droplets and intimate contact. If novel coronavirus is diagnosed, customs clearance is not allowed. If you are flying in novel coronavirus, you should take protective measures, wear a mask correctly, understand the epidemic situation at the destination, and wash your hands or wipe your hands with a wet towel after touching the button door handle. Since June 5438+1October 8, 2023, the Macao SAR Government has implemented new entry measures: people from countries and regions outside China must hold a 48-hour COVID-19 antigen or nucleic acid test certificate. People from mainland China, Hongkong and Taiwan Province Province don't need to show their COVID-19 exam certificates. Entry and exit through Zhuhai-Macao port requires 72 hours of negative nucleic acid certificate, and customs clearance measures will be implemented until June 7 at 24: 65438.