The mixed messaging can come from the same media outlet — and even the same source. On Fox News Channel on Monday, host Sean Hannity looked straight into the camera to deliver a clear message: “It absolutely makes sense for many Americans to get vaccinated. I believe in science. I believe in the science of vaccinations.” Yet Hannity followed up his statement by interviewing a woman protesting her college’s requirement that students be vaccinated, a segment appealing to people skeptical of the immunization push.