The ASTM F3502-21 Mask Specification Standards
This specification is primarily intended to help ensure barrier face coverings meeting the stated requirements
COVID Timeline
This timeline, along with other studies and efforts, was done to shed light on a novel coronavirus known as COVID-19 developed in the Chinese city of Wuhan at the end of 2019.
New Masking Guidelines May Proceed as the Omicron Virus Continues to Emerge
In late November 2021, the World Health Organization (WHO) identified a new SARS-CoV-2 strain, called the Omicron variant.