that's according to dr. anthony fauci who says as many as 20 to 30% of unvaccinated americans may now be inclined to get the shot. cnn's kristen holmes joins us now live. kristen, what have you seen so far when it comes to the mandating of vaccines? >> we really are starting to see that sort of cascade effect that officials had hoped for. this was the big goal and the big hope when you look at full approval. you had some people thinking it would move the dial on vaccine hesitancy, but you also hear from a lot of health official who's say we're just not sure how far it's going to move the dial. but what we did hear from experts, health experts, as well as legal experts was that this full approval would give the cover to these organizations and universities that they needed to actually impose a vaccine mandate. and that's what we're starting to see as early today. we heard almost immediately after full approval from the mayor of new york city that there would be a covid-19 mandate for all members of the department of education. no test-out option. this makes them the largest