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Table 3 Pre- and post-vaccination seroprotection rate (percentage of subjects with haemagglutination inhibition titre ≥ 1:40)

From: Safety and immunogenicity of an MF59™-adjuvanted subunit influenza vaccine in elderly Chinese subjects

Viral strain Vaccination status Sub/MF59™, % (n = 367) Subunit, % (n = 187)
A/H1N1 Pre-vaccination 98.4 97.3
  Post-vaccination 99.7 99.5
A/H3N2 Pre-vaccination 21.5 18.7
  Post-vaccination 88.0* 72.2
B Pre-vaccination 2.2 2.1
  Post-vaccination 35.7 28.3
  1. *P < 0.001 versus the Subunit group
  2. Sub/MF59™, MF59™-adjuvanted subunit influenza vaccine; Subunit, non-adjuvanted subunit influenza vaccine