I wonder why the measles vaccination rate for Oracle is so high (~99%). Is the culture of the parents at Oracle that different from Pixar (~68%)? I wonder if there was a localized anti-vaccine movement at Pixar. Pixar has a relatively small number of employees (1,200) compared to Oracle (122,000), so their daycare is probably a lot smaller and the parents with kids attending the Pixar daycare are much more likely to know each other. So, a few parents spreading anti-vaccination philosophy could have a larger influence over the decision to vaccinate.