| http://www.w3.org/ns/prov#value | - This year???s version protects against the two common Type A strains H1N1 and H3N2, and one strain of Type B influenza virus.??? Quadrivalent vaccine:New this year, this vaccine that protects against four types of influenza ??? the same three strains as the regular flu shot, plus an additional B-strain virus that primarily affects kids.
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