Assessed solicited local AEs are pain, redness and swelling at the injection site. Pain includes tenderness. Note: GSK diary cards for collecting solicited local and general AEs/symptoms is different for subjects \< 6 years and ≥ 6 years. Hence the age category of 1-11 years is further split to 1-5 years and 6-11 years.

Assessed solicited general AEs among Infants/Toddlers/Children \< 6 years are: * Drowsiness * Fever\* * Irritability/Fussiness * Loss of appetite * Gastrointestinal (GI) symptoms\*\* Assessed solicited general AEs among Children ≥ 6 years are: * Fatigue * Fever\* * GI symptoms\*\* * Headache * Myalgia * Shivering (chills) * Fever is defined as temperature ≥ 38.0°C/100.4°F \*\*GI symptoms include nausea, vomiting, diarrhoea, and/or abdominal pain Note: GSK diary cards for collecting solicited local and general AEs/symptoms is different for subjects \< 6 years and ≥ 6 years. Hence the age category of 1-11 years is further split to 1-5 years and 6-11 years.

Assessed solicited general symptoms among Infants/Toddlers/Children \< 6 years are: * Drowsiness * Fever\* * Irritability/Fussiness * Loss of appetite * GI symptoms\*\* Assessed solicited general symptoms among Children ≥ 6 years are: * Fatigue * Fever\* * GI symptoms\*\* * Headache * Myalgia * Shivering (chills) * Fever is defined as temperature ≥ 38.0°C/100.4°F \*\*GI symptoms include nausea, vomiting, diarrhoea, and/or abdominal pain As subjects from the control group are not vaccinated, they will not complete the diary card for local solicited symptoms.

An unsolicited AE is any AE reported in addition to those solicited during the clinical study. Also, any 'solicited' symptom with onset outside the specified period of follow-up for solicited symptoms is to be reported as an unsolicited adverse event.

An unsolicited symptom is any symptom reported in addition to those solicited during the clinical study. Also, any 'solicited' symptom with onset outside the specified period of follow-up for solicited symptoms is to be reported as an unsolicited adverse event.

An SAE is any untoward medical occurrence that results in death, is life-threatening, requires hospitalization or prolongation of existing hospitalization or results in disability/incapacity. pIMDs are sub sets of Adverse events of special interest (AESIs) that include autoimmune disease and other inflammatory and/neurological disorders of interest, which may or may not have autoimmune aetiology. The renal allograft rejections are biopsy confirmed pathophysiological changes indicative of rejection. The rejection is graded for severity and extent of histologic inflammation and injury. The reporting period for any renal allograft rejection is from Visit Day 1 to the study end (month 2).

All seizures occurring within 30 days following study vaccination are reported.

All seizures occurring within 30 days after visit day 1 are reported, for the control groups.

Generalized convulsive seizures are classified as follows: * Level 1 of diagnostic certainty: witnessed sudden loss of consciousness AND generalized, tonic, clonic, tonic-clonic, or atonic motor manifestations * Level 2 of diagnostic certainty: history of unconsciousness AND generalized, tonic, clonic, tonic-clonic, or atonic motor manifestations * Level 3 of diagnostic certainty: history of unconsciousness AND other generalized motor manifestations * Level 4 of diagnostic certainty: reported generalized convulsive seizure with insufficient evidence to meet the case definitions for Level 1, 2 or 3 of diagnostic certainty above * Level 5 of diagnostic certainty: Not a case of generalized convulsive seizure Only levels 1 to 3 of generalized convulsive seizures will comprise the analysis for this outcome measure.

Generalized convulsive seizures are classified as follows: * Level 1 of diagnostic certainty: witnessed sudden loss of consciousness AND generalized, tonic, clonic, tonic-clonic, or atonic motor manifestations * Level 2 of diagnostic certainty: history of unconsciousness AND generalized, tonic, clonic, tonic-clonic, or atonic motor manifestations * Level 3 of diagnostic certainty: history of unconsciousness AND other generalized motor manifestations * Level 4 of diagnostic certainty: reported generalized convulsive seizure with insufficient evidence to meet the case definitions for Level 1, 2 or 3 of diagnostic certainty above * Level 5 of diagnostic certainty: Not a case of generalized convulsive seizure Only levels 1 to 3 of generalized convulsive seizures will comprise the analysis for this outcome measure

The geometric mean concentration (GMC) calculations are performed by taking the anti log of the mean of the log concentration transformations. Antibody concentrations below the cut-off of the assay will be given an arbitrary value equal to half the cut-off for GMC calculation