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" ... “There are a lot of microorganisms that cause infection that interact with human cells by binding to sugars on the surface of those cells.” Says Dr. Petri, “The best example of that is influenza. The flu virus binds to the sugar on the surface of human cells called sialic acid.” Continuing that, “Tamiflu is a drug that inhibits the binding ability of influenza to these sugars and that is a great example where the recognition of neuraminic acid’s (an acidic amino sugar in the blood) interaction helped identify an effective antiviral medicine.” ... "