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If you have gastrointestinal problems like acid reflux or gastroesophageal reflux disease (GERD), you may notice a metallic taste in your mouth

The biochemistry is real

[1] [3] This condition is typically confirmed through blood tests for anti-intrinsic factor antibodies

Internal proteins such as the polymerase subunits (PA, PB1, PB2), matrix and nucleoprotein can have conservation in sequence of 7797% within influenza A but much reduced conservation with influenza B species

You may find you can get them for less if you buy a box at a time - often $300 to $400 - and $25 to $50 a shot

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