evidence: A single 0.5 mL dose of Influenza A (H1N1) 2009 Monovalent Vaccine contains sodium chloride (4.1 mg), monobasic sodium phosphate (80 mcg), dibasic sodium phosphate (300 mcg), monobasic potassium phosphate (20 mcg), potassium chloride (20 mcg), and calcium chloride (1.5 mcg). From the manufacturing process, each dose may also contain residual amounts of sodium taurodeoxycholate (≤ 10 ppm), ovalbumin (≤ 1 mcg), neomycin sulfate (≤ 0.2 picograms [pg]), polymyxin B (≤ 0.03 pg), and beta-propiolactone (< 25 nanograms) [...] Influenza A (H1N1) 2009 Monovalent Vaccine, for intramuscular injection, is a homogenized, sterile, colorless to slightly opalescent suspension in a phosphate-buffered saline solution formulated to contain 15 mcg hemagglutinin per 0.5-mL dose of the influenza A/California/7/2009 (H1N1)v-like virus. Thimerosal, a mercury derivative, is added as a preservative. Each dose contains 25 mcg mercury. Each dose may also contain residual amounts of egg proteins (≤1 mcg ovalbumin), formaldehyde (≤25 mcg), and sodium deoxycholate (≤50 mcg). Antibiotics are not used in the manufacture of this vaccine. [...] The 5-mL multidose vial formulation contains thimerosal, a mercury derivative, added as a preservative. Each 0.5-mL dose from the multidose vial contains 25 mcg mercury.