Hypotonic-hyporesponsive episode (HHE) as an adverse event following immunization: case definition and guidelines for data collection, analysis, and presentation

Bonhoeffer, JGold, MSHeijbel, HVermeer, PrivmBlumberg, DBraun, Mde Souza-Brito, GDavis, RLHalperin, SHeininger, UKhuri-Bulos, NMenkes, RNokleby, HBrighton Collaboration HHE Working Group, The2025-03-182025-03-18200410.1016/j.vaccine.2003.09.009https://rivm.openrepository.com/handle/10029/640371Hypotonic-hyporesponsive episode (HHE) as an adverse event following immunization: case definition and guidelines for data collection, analysis, and presentationArticleVaccine 2004; 22:563-82025-03-18