On April 12, 2020, the World Health Organization (WHO) published Environmental Health Criteria 244:  Principles and methods to assess the risk of immunotoxicity associated with exposure to nanomaterials.  WHO states that the document presents an overview of the current knowledge and evidence on principles and basic mechanisms of immunotoxicity caused by engineered nanomaterials (ENM). 

The World Health Organization’s (WHO) International Program on Chemical Safety (IPCS) published a draft Environmental Health Criteria (EHC) Document, Principles and Methods to Assess the Risk of Immunotoxicity Associated with Exposure to Nanomaterials.  According to IPCS, the target audience is risk assessors in a regulatory setting, researchers, and industry that needs to provide the