Is the 48-hour nucleic acid certificate the same as the health code?

It's different. According to relevant information, the health code is based on real data, and citizens or workers who have returned to work can declare it online by themselves, and generate personal QR code after background audit. A negative 48-hour nucleic acid test certificate means that the nucleic acid test report is valid within 48 hours or less. If it exceeds 48 hours, a new nucleic acid test is needed.