Behind the Mask: Testing Protocols and Usage in Combating Viruses and Bacteria

Behind the Mask: Testing Protocols and Usage in Combating Viruses and Bacteria

by ads Converclick on April 19, 2024

In our continuous battle against respiratory viruses and bacteria, face masks such as KN95, N95, and disposable masks serve as essential defenses. This comprehensive guide explores how these masks are tested for their efficacy, discusses their usage in hospital settings, and compares their costs and functionalities, helping you make informed decisions when purchasing from Cetrix Store.

Types of Masks and Their Uses:

  • KN95 Masks: Conform to Chinese standards and filter out at least 95% of airborne particles.
  • N95 Masks: Adhere to U.S. NIOSH standards, with similar filtration capabilities as KN95 but different testing and fit requirements.
  • Disposable Face Masks: Common in healthcare settings, offering protection against droplets containing viruses and bacteria.

Most Commonly Used Masks in Hospitals and Why:

  • Surgical Masks: Widely used for general procedures; they protect against droplets but are not designed for airborne pathogens.
  • N95 Respirators: Preferred in settings where aerosol-generating procedures are performed because they provide a tighter fit and superior filtration.
  • Specialty Masks (e.g., PAPRs): Used in high-risk scenarios such as treating patients with airborne diseases like tuberculosis.

Cost Comparison: N95 vs. KN95 Masks:

  • N95 Masks: Generally more expensive due to stricter certification processes in the U.S. and higher production standards.
  • KN95 Masks: Tend to be more economical and are a viable alternative, offering comparable protection but often at a lower price point, making them cost-effective for bulk purchases at institutions like hospitals.

Filtration and Safety Testing:

  • Particle Filtration Efficiency (PFE): Measures the percentage of particles blocked by the mask material.
  • Bacterial Filtration Efficiency (BFE): Tests the mask’s ability to prevent the transmission of bacteria.
  • Viral Filtration Efficiency (VFE): Similar to BFE but tests for the mask’s ability to block viruses.
  • Breathability Test (Differential Pressure Test): Assesses the air flow resistance of the mask, affecting comfort.
  • Fluid Resistance: Important for surgical masks to protect against blood and body fluids in medical settings.
  • Fit and Leakage Testing (Fit Test and Total Inward Leakage): Ensures a tight seal and assesses the leakage of substances inside the mask.

Certification and Compliance:

  • Masks must comply with local and international standards, like NIOSH for N95 in the USA and various standards for KN95 in China, ensuring that they meet rigorous safety and performance criteria.

Frequently Asked Questions (FAQ)

1. Which mask offers the best protection for hospital staff?

The N95 respirator offers superior protection due to its ability to filter out both large and small particles when the wearer inhales. It is particularly effective in hospital settings where aerosol-generating procedures are performed.

2. Are KN95 masks suitable for everyday use outside of hospital settings?

Yes, KN95 masks are suitable for everyday use and provide substantial protection against pathogens. They are an excellent choice for public settings and are more readily available and economical, especially when purchased in bulk from Cetrix Store.

3. How often should disposable masks be replaced?

Disposable masks should be replaced whenever they become soiled, damaged, or moist. In hospital settings, it is recommended to replace the mask between patients to maintain optimal hygiene and effectiveness.


Understanding the different types of face masks and their specific applications, particularly in medical settings, is crucial for choosing the right mask. Whether you're a healthcare professional looking for the best protection or a member of the public seeking effective daily wear, Cetrix Store provides certified and tested options to meet your needs.

Visit Cetrix Store today to explore our selection of N95, KN95, and disposable masks

Take advantage of our competitive pricing, especially on bulk purchases, and ensure you are equipped with the best protection available. Shop now and stay safe!