In addition to keeping tabs on the NASD’s flu occurrences (http://www.nazarethasd.k12.pa.us/nazarethasd/cwp/view.asp?A=3&Q=293233), Google has a pretty good tracking system itself available here: http://www.google.org/flutrends/intl/en_us/
Today’s graph shows that flu activity in 2009 in September was already approaching peak levels from last year (February).
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