Sourced of - Chief Nerd - https://rumble.com/v22pccq--dr.-ryan-cole-on-a-new-study-showing-unusually-high-igg4-antibody-levels-p.html?mref=6zof&mc=dgip3&ep=2 “This is ok if you’re trying to fight off an allergy. This is really bad news if you’re exposed to a virus in the future that’s similar to this virus” Study: https://www.science.org/doi/10.1126/sciimmunol.ade2798