Both COVID vaccines and the virus itself are "plausible triggers" of the disease, but the study authors specify that vaccines were "more frequently" linked to the ulcers than the virus.
The study also found that the effectiveness of the Pfizer and Moderna vaccines was only 29% during the omicron BA.4 and BA.5 variant phases, 20% during the BQ-dominant phase, and 4% during the XBB-dominant phase.
Currently serving as the president of the American Federation of Teachers (AFT), the second-largest teachers' union in the country, Weingarten was instrumental in shaping COVID policies in academic settings.
Former CDC Director Rochelle Walensky, former NIAID Director Antony Fauci, and former NIH Director Francis Collins knew about the vaccine breakthrough infections.
A study published in a journal from the American Medical Association found that every person testing positive for COVID-19 following a 2022 health conference in Germany was vaccinated, according to a study.
