H1N1 wanes, but third wave could emerge
February 28, 2010 — Jesse… there has been almost no “seasonal flu” in recent months. the strains circulating last season and still occasionally found this season — H3N2 , other forms of H1N1 and influenza B — have all been outcompeted by the upstart H1N1. …
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H1N1 wanes, but third wave could emerge