Update from 2014: An article exploring a similar concept was published 7 years later, our poster was presented at 2009 ACAAI. Here is the paper: Internet searches and allergy: temporal variation in regional pollen counts correlates with Google searches for pollen allergy related terms - Annals of Allergy, Asthma & Immunology http://buff.ly/1BTRZ1G
Google Blogoscoped writes about human predictability trends seen in Google searches:
"Google Trends shows an interesting search popularity graph for the queries “turkey” (as in turkey, the food) and “diet.” Searches for the traditional turkey meal peak on Thanksgiving followed by a smaller peak on Christmas. The New Year Day's resolutions bring a surge in queries for "diet" every year, over and over again:
There is an interesting correlation between depression and rain:
Searches for "allergy" peak every spring:
Immunization "shots" searches are most popular in October/November:
Not surprisingly, searches for "bee sting" peak every summer:
"Asthma" searches show a double-peak distribution with the highest frequency in spring and winter, with exacerbations triggered by pollens and upper respiratory tract infections, respectively:
Google Trends Reveals People’s Predictability. Google Blogoscoped.
Microsoft Blogger Has as Much PR Power as CEO. What Does That Mean for Your Hospital?
Google Blogoscoped images under a Creative Commons license.
Compare The Popularity of Any Topic on Facebook with Lexicon. Digital Inspiration, 04/2008.
Google Trends with Numbers. Google Operating System, 06/2008.
A new flavor of Google Trends. Official Google Blog, 06/2008.
Google Shows Search Volumes. Google Operating System, 07/2008.
Keyword Tool updated with search volume data. Inside AdWords, 07/2008.