There are multiple definitions:

1. International Health Regulations(English)

   • the governing framework for global health security since 2007. Declaring public health emergencies of international concern (PHEIC) is a cornerstone
   • PHEIC
   • Organizations (international), Public Health, Emergency medicine
   • https://doi.org…093/jtm/taaa227

2. immediate hypersensitivity reaction(English)

   • AX, CX, DPT, IgE, MDM, PPL, RAST, ST, TCD
   • Allergy
   • https://doi.org…601-020-00368-1

3. intermediate–high risk(English)

   • may refer to pulmonary embolism
   • PE, CDT, ECMO, PAP
   • Risk factor, Pulmonology, Thrombocyte /thrombosis