No, tested by SGS, a global authoritative certification body, the bacteriostatic rate of this mask against Candida albicans, Escherichia coli, Staphylococcus aureus and other bacteria is ≥99%. Therefore, this mask can not only filter bacteria and viruses in the air, but also kill them, avoiding the secondary spread of bacteria and viruses residing in the meltblown cloth layer of the mask, and has great product advantages.