# filtration efficiency

Sichuan Report Finds Winner Medical Subsidiary’s Masks Fail Safety Tests, Raising Questions about PPE Quality Control

Sichuan regulators announced that two samples of WN‑N95 masks registered to Winner Medical’s Huanggang unit failed safety tests, citing poor filtration, inadequate fit and microbiological contamination. The finding, part of a wider provincial sampling sweep that flagged 17 non‑compliant batches, raises questions about batch control, storage and the scrutiny of PPE suppliers in China.