Katie Couric has lost substantial journalistic credibility with respect to science reporting (if that even matters to her or her audience). She chose the false balance route of reporting by giving significantly more time to heart-wrenching, but ultimately irrelevant, stories about HPV vaccines. But she gave not one second to someone who had to deal with cervical cancer. Or to interviewing the 50 million or so kids who received the vaccine without any problems. Or to the huge numbers of knowledgeable people in the pro-science community who understand the incredible level of the scientific consensus about vaccines.