Aerosols Current Affairs - 2020

NSAFE: First antimicrobial and washable Face Mask

The Startup of IIT Delhi has found an antimicrobial face mask that can be washed and reused for 50 times. The Nanosafe Solutions at IIT Delhi has developed the masks to fight against COVID-19.


The NSAFE face mask provides 99.2% of bacterial filtration. This is the first fabric-based face mask that is antimicrobial and washable. The mask complies ASTM standards.

ASTM International

It was formerly known as American Society for Testing and Materials. It is an international standards organization that develops and publishes technical standards for materials, services and products. The headquarters of the organization is located in Pennsylvania. It was founded in 1898.

About the mask

The Mask provides the wearer three different mechanisms namely mechanical filtration, repulsion of aerosol droplets and antimicrobial decontamination.

The mask consists of three layers namely inner hydrophilic layer that provides comfort by absorbing moisture and sweat. This, eases breathing of the wearer. The second layer has antimicrobial activity and the outer most layer has water and oil repellent behaviour. The mask is also splash resistant.

What is splash resistant?

Splash resistance is the capability of the mask to survive in rain as well. In simple words, the mask and its layers will work the same in rain as well. They are water proof.

DRDO Mobile COVID-19 Testing Lab inaugurated by Defence Minister

On April 24, 2020, Defence Minister Raj Nath Singh inaugurated mobile COVID-19 testing laboratory facility. The facility is capable of testing 1000 samples in a day.


The Mobile Virology Research and Diagnostics Laboratory (MVRDL) was developed by DRDO in association with the ESIC Hospital in Hyderabad. The laboratory was set up in 15 days and is of Bio Safety level 2 and Bio Safety level 3. It has been built complying ICMR and WHO Bio Safety Standards.

What are Bio-Safety Levels?

There are four Bio-Safety Levels (BSL) followed in Indian Standards. They comply to WHO guidelines. They are BSL-1, BSL-2, BSL-3 and BSL-4.

Bio-Safety Level 1

The BSL-1 laboratories are used to study infectious agents, toxins. They do not require special equipment or design features.

Bio-Safety Level 2

The BSL-2 laboratories study moderately infectious agents. These laboratories should include hand washing sinks, doors that close automatically and lock in case of accidents and eye washing stations.

Bio-Safety Level 3

The BSL-3 laboratories should hold controlled and directional air flow. They should have equipment to decontaminate laboratory waste, incinerators based on the biological risk assessment.

Bio-Safety Level 4

The BSL-4 laboratories are those that pose high risks of aerosol transmitted infections. These examine life threatening infections for which no vaccines are available. Significant training is required to access these laboratories.