Is ‘Fully Vaccinated’ ‘Up-to-Date?’ Experts Are Worried Americans Are Too Confused to Care

Part of the problem, David O’Connor, a professor of pathology and laboratory medicine at the University of Wisconsin, said, is that the CDC may have painted itself into a corner by initially describing those who went through a two-dose mRNA vaccine course as “fully vaccinated,” despite not knowing the long-term efficacy of the vaccines against new variants.