Home / Standards / GB/T 46937-2025 GB/T 46937-2025 Upcoming Test method for the viral filtration efficiency (VFE) of medical masks and materials—Test method using bacteriophage Phi-X 174 aerosol 医用口罩及材料病毒过滤效率测试方法 Phi-X174噬菌体气溶胶法 Standard Type GBT ICS 11.140 CCS C48 Status 即将实施 Issue Date 2025-12-31 Implementation 2027-01-01 Responsible Dept 国家标准委 Drafting Unit N/A