. >> reporter: aidan con murphy founded gen z for change, an organization recruited by the white househelp promote the vaccine. >> gen z for change is a coalition of over 500 tiktok creators with a combined following of 432 million people. our cumulative reach in one month is about 1.5 billion views. that's more than cnn, msnbc, and fox news combined per month. >> i don't know. who needs to hear this? but -- >> reporter: one of gen z for change's team members is lacy b., a missouri-based tiktoker with over 1 million followers. >> i'm personally talking to my black and brown communities here when i say i understand why we wouldn't touch [ bleep ] the government gives us. but i'm also telling you that we are the most affected by the virus. >> reporter: what are some of the specific hesitations that you're hearing about as to why people won't get the vaccine? >> most of the questions were just basically can they trust it and just seeing how i reacted with it and just asking me my personal experience when it comes to the vaccine. >> reporter: in missouri, where she lives, less than 50% of