There are multiple definitions:

1. average health status(English)

2. abacavir hypersensitivity syndrome(English)

   • elicits a drug hypersensitivity reaction in up to 8% of treated patients. Symptoms include fever, malaise, nausea, diarrhea and skin rash, and the condition can be fatal in severe cases
   • Adverse effect
   • https://doi.org…598-019-47001-1

3. ankle hindfoot scale(English)

   • AOFAS, AHS, AOFAS-AHS, EQ-5D, FAOS, MOXQ, PROM, SF-36, VAS FA
   • Orthopedics, Scoring systems/scales
   • https://doi.org…pen-2017-017040

4. American Headache Society(English)

   • Headache, Organizations (documentation), Education, Social media
   • https://doi.org…1111/head.13500