Kahi, Charles J.2023-07-102023-07-102022Kahi CJ. Blue Notes. Clin Gastroenterol Hepatol. 2022;20(7):1425-1426. doi:10.1016/j.cgh.2022.04.007https://hdl.handle.net/1805/34293Comment on: doi: 10.1016/j.cgh.2022.02.030; doi: 10.1016/j.cgh.2021.12.032; doi: 10.1016/j.cgh.2021.06.020; doi: 10.1016/j.cgh.2021.11.031en-USPublisher PolicyCOVID-19 vaccinationVaccine effectivenessImmunocompromised individualsInflammatory bowel diseaseSeroconversionArticle