We already know nearly everyone hospitalized is unvaccinated. We also know a significant number of American healthcare workers are among the millions of people still unvaccinated, as Mika Brzezinski said. "NBC News correspondent Gabe Gutierrez joins us now with a look at why. What did you find out? You would think these are the people that know the most?" "About one in four healthcare workers in this country still have not been vaccinated.