Adjusted geometric means (GMC) of GSK1437173A over placebo for anti-glycoprotein E (gE) antibody enzyme-linked immunosorbent assay (ELISA) concentrations in PreChemo Groups only.

Antibody concentrations as determined by ELISA are presented as geometric mean concentrations (GMCs) and expressed in milli-international units per milliliter (mIU/mL). The seropositivity cut-off value was greater than or equal to (≥) 97 mIU//mL.

Assessed solicited local symptoms were pain, redness and swelling. Any = occurrence of the symptom regardless of intensity grade. Grade 3 pain = pain that prevented normal every day activities. Grade 3 redness/swelling = redness/swelling spreading beyond 100 millimeters (mm) of injection site.

The number of days with any local symptoms has been assessed during the post-vaccination period.

Assessed solicited general symptoms were fatigue, gastrointestinal \[symptoms included nausea, vomiting, diarrhoea and/or abdominal pain\], headache, myalgia, shivering and fever \[defined as oral, axillary or tympanic temperature equal to or above 37.5 degrees Celsius (°C)\]. Any = occurrence of the symptom regardless of intensity grade. Grade 3 symptom = symptom that prevented normal activity. Grade 3 fever = fever \> 39.0 °C. Related = symptom assessed by the investigator as related to the vaccination.

The number of days with any general symptoms has been assessed during the post-vaccination period.

An unsolicited AE covers any untoward medical occurrence in a clinical investigation subject temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product and reported in addition to those solicited during the clinical study and any solicited symptom with onset outside the specified period of follow-up for solicited symptoms. Any was defined as the occurrence of any unsolicited AE regardless of intensity grade or relation to vaccination. Grade 3 AE = an AE which prevented normal, everyday activities. Related = AE assessed by the investigator as related to the vaccination.

Serious adverse events (SAEs) assessed include medical occurrences that result in death, are life threatening, require hospitalization or prolongation of hospitalization or result in disability/incapacity. Related SAE= SAE assessed by the investigator as causally related to the study vaccination.

Potential immune-mediated diseases (pIMDs) are a subset of AEs that include autoimmune diseases and other inflammatory and/or neurologic disorders of interest which may or may not have an autoimmune aetiology. Related = pIMDs assessed by the investigator as causally related to the study vaccination.