Update Friday 6am ET: The advisory CDC panel recommended that children under the age of 4 do not receive the combined MMRV vaccine (for measles, mumps, rubella, and varicella) but instead receive two separate shots. This week has been an eventful one for America's public health agency. Two former leaders of the US Centers for...

This is today's edition ofThe Download,our weekday newsletter that provides a daily dose of what's going on in the world of technology. A pivotal meeting on vaccine guidance is underway-and former CDC leaders are alarmed This week has been an eventful one for America's public health agency. Two former leaders of the US Centers for...