Among expressed cytokines were interleukin-2 (IL-2), tumour necrosis factor alpha (TNF-α) and interferon gamma (INF-γ), as determined by intracellular cytokine staining (ICS).

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 activity. Grade 3 redness/swelling = redness/swelling spreading beyond 50 millimeters (mm) of injection site.

Assessed solicited general symptoms were fatigue, temperature \[defined as axillary temperature equal to or above 37.5 degrees Celsius (°C)\], gastrointestinal symptoms \[nausea, vomiting, diarrhoea and/or abdominal pain\] and headache. 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.

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 out-side 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.

Adverse events of specific interest include auto-immune diseases (AID) and immune mediated disorders such as neurological/demyelinating events, rheumatic and connective diseases, autoimmune endocrine diseases, inflammatory bowel diseases, autoimmune blood disorders, inflammatory skin disorders, other autoimmune/inflammatory events.

Among haematological and biochemical parameters determined were alanine aminotransferase \[ALT\], aspartate aminotransferase \[ASA\], basophils \[BASO\], creatinine \[CREA\], eosinophils \[EOS\], haematocrit \[HAEM\], haemoglobin \[HAEMO\], lymphocytes \[LYMPH\], monocytes \[MONO\], neutrophils \[NEU\], platelets \[PLA\], red blood cells \[RBC\], urea \[UR\] and white blood cells \[WBC\]. Levels of haematological/biochemical parameters assessed in relation to normal laboratory values were - unknown, below, within and above.