A Study to Evaluate the Safety and Efficacy of Inactivated Varicella-zoster Vaccine (VZV) as a Preventative Treatment for Herpes Zoster (HZ) and HZ-related Complications in Adult Participants With Solid Tumor or Hematologic Malignancy (V212-011)

Clinical criteria for suspected HZ cases were the development of a papular or vesicular rash with a dermatomal or generalized distribution, or in the absence of a rash, clinical suspicion of VZV infection with or without the detection of VZV in diagnostic specimens from blood, cerebrospinal fluid, lung, liver, or other organ. All suspected cases of HZ were subjected to adjudication by the Clinical Adjudication Committee (CAC). Case confirmation was based on skin lesion polymerase chain reaction, if available, or by adjudication of the clinical case description by the CAC, conducted according to the CAC Standard Operations Procedure.

Time frame: Up to approximately 5 years

Population: This analysis was based on the Modified Intent-to-Treat (MITT) population. The MITT population for this outcome measure included all randomized participants in the STM population who received at least one dose of vaccination. This endpoint was exploratory for the HM population, therefore that group was not included in this analysis.

An adverse event (AE) is defined as any unfavorable and unintended change in the structure, function, or chemistry of the body temporally associated with the use of the sponsor's product, whether or not considered related to the use of the product. A serious adverse event (SAE) is an AE that results in death, is life threatening, results in a persistent or significant disability or incapacity, results in or prolongs an existing hospitalization, is a congenital anomaly or birth defect, is a cancer, is an overdose, or is another important medical event.

Time frame: Up to 28 days after vaccination 4 (up to approximately 118 days)

Population: The analysis population included all participants who received ≥1 dose of vaccination or placebo and had safety follow-up. Three participants in the STM population were cross-treated, these participants were excluded from the safety analyses. This endpoint was exploratory for the HM population, therefore that group was not included in this analysis

The composite efficacy endpoint of the incidence of HZ complications was defined as the occurrence of any of the following during the study: hospitalization or prolongation of hospitalization due to HZ, disseminated HZ (including disseminated HZ rash or VZV viremia), visceral HZ, ophthalmic HZ, neurological impairment due to HZ, or administration of intravenous acyclovir therapy for treatment of HZ.

Time frame: Up to 6 months after onset of HZ (up to approximately 5 years)

Population: This analysis was based on the MITT population. The MITT population for this outcome measure included all randomized participants in the STM population who received at least one dose of vaccination. This endpoint was exploratory for the HM population, therefore that group was not included in this analysis.

Moderate to severe HZ-associated pain was defined as 2 or more occurrences of a score of 3 or greater (0-to-10 scale, where 0 is no pain and 10 is pain as bad as you can imagine) on the Zoster Brief Pain Inventory (ZBPI) at any time from HZ onset through the end of the 6 month HZ-follow-up period.

Time frame: Up to 6 months after onset of HZ (up to approximately 5 years)

Population: This analysis was based on the MITT population. The MITT population for this outcome measure included all randomized participants in the STM population who received at least one dose of vaccination. This endpoint was exploratory for the HM population, therefore that group was not included in this analysis.

Postherpetic Neuralgia (PHN) was defined as pain in the area of the HZ rash with pain in the last 24 hours scored as 3 or greater (on a 0 to 10 scale, where 0 is no pain and 10 is pain as bad as you can imagine) on the ZBPI that persists or appears greater than or equal to 90 days after HZ rash onset.

Time frame: Up to 6 months after onset of HZ (up to approximately 5 years)

Population: This analysis was based on the MITT population. The MITT population for this outcome measure included all randomized participants in the STM population who received at least one dose of vaccination. This endpoint was exploratory for the HM population, therefore that group was not included in this analysis.

An adverse event (AE) is defined as any unfavorable and unintended change in the structure, function, or chemistry of the body temporally associated with the use of the sponsor's product, whether or not considered related to the use of the product. A serious adverse event (SAE) is an AE that results in death, is life threatening, results in a persistent or significant disability or incapacity, results in or prolongs an existing hospitalization, is a congenital anomaly or birth defect, is a cancer, is an overdose, or is another important medical event.

Time frame: Up to 28 days after vaccination 4 (up to approximately 118 days)

Population: The analysis population included all participants who received ≥1 dose of vaccination or placebo and had safety follow-up. Three participants in the STM population were cross-treated, these participants were excluded from the safety analyses. This endpoint was exploratory for the HM population, therefore that group was not included in this analysis