Vaccine Info

CRV-101 Shingles Vaccine

Authored by
Last reviewed
February 11, 2022
Fact checked by
Robert Carlson, MD

CRV-101 Vaccine Description For 2022

Curevo Vaccine's CRV-101 is a next-generation shingles vaccine candidate designed to maximize the CMI protection by combining the gE protein antigen with our proprietary adjuvant. CRV-101 is an investigational adjuvanted subunit vaccine for the indication of the prevention of Herpes Zoster in older adults. The adjuvanted subunit vaccine strategy contrasts with traditional approaches using live killed or attenuated viruses. Sub-unit vaccines do not contain virus components and cannot cause infection. The adjuvant component was specifically engineered to produce an optional immune response while using a smaller amount of adjuvant with a targeted structure-function approach.

An effective varicella-zoster virus (VZV) vaccine requires a potent induction of VZV-specific cell-mediated immunity (CMI) since reduced CMI to VZV has been associated with increased risks of developing shingles. These CMI responses through triggering antigen-specific T cells that eliminate infected cells in the system says the company.

Curevo is a Bothell, WA, based clinical-stage company with partners in South Korea's Mogam Institute for Biomedical Research and GC Pharma. For more information, please visit

CRV-101 Vaccine Indication

Once children are infected with chickenpox, the Varicella Zoster Virus remains in the sensory ganglia, says the U.S. CDC. VZV typically remains inactive and reactivates to cause shingles with age-related immunosenescence. The CRV-101 vaccine candidate is currently indicated to prevent shingles in adults age 50 and older.

CRV-101 Vaccine Side Effects

The CRV-101 Phase 1 study included 90 subjects, with solicited reactogenicity adverse events consisting of no grade 3 local injection site events and only one grade 3 systemic event (fever) in the highest dose group.

CRV-101 Vaccine Dosage

A Phase 1, Randomized, Placebo-Controlled, Observer-Blind, Antigen Dose-Escalation and Adjuvant Dose-Ranging Clinical Trial is Evaluating the Safety, Tolerability, and Immunogenicity of various CRV-101 dosages in 90 Healthy Adult Subjects.  Group 1 Subjects receive 2 doses of the candidate CRV-101 formulation 1, administered intramuscularly (IM) in the deltoid region of non-dominant arm, according to a 0, 2 Month schedule. Group 2 Subjects receive 2 doses of the candidate CRV-101 formulation 2, administered intramuscularly (IM) in the deltoid region of non-dominant arm, according to a 0, 2 Month schedule. Furthermore, Groups 3 and 4 received increasing doses.

CRV-101 Vaccine News For 2021 - 2022

February 10, 2022 - Curevo Vaccine announced the closing of a $60 million Series A financing round.

March 18, 2021 - Curevo Vaccine announced approval was granted to move forward with a Phase 1b pediatric clinical trial in South Africa to evaluate the safety, efficacy, and immunogenicity of its non-live investigational vaccine CRV-101 against varicella (chickenpox) in immunocompromised pediatric HIV-infected populations. Curevo Vaccine submitted its clinical trial application to the South African Health Products Regulatory Authority, an entity of the South African Government's National Health Department, in November 2020.

September 15, 2020 - Curevo Vaccine announced antibody response data from its completed Phase 1 study investigating the safety, tolerability, and immune system response of CRV-101 in several formulations.

September 26, 2019 - Curevo, Inc. announced encouraging preliminary Phase I safety and tolerability results of their Shingles vaccine candidate, CRV-101. Interim trial results demonstrating a promising safety and tolerability profile of the vaccine in 90 healthy adults ≥18 to <50 were presented in an oral presentation at the 44th annual International Herpesvirus Workshop in Knoxville, Tennessee.

November 5, 2018 - Curevo announced that the U.S. FDA had advanced the company's Investigational New Drug application for CRV-101.

CRV-101 Clinical Trial

Clinical Trial NCT03820414: Safety, Tolerability, and Immunogenicity of CRV-101 in Healthy Adult Subjects. A Phase 1b clinical trial will be conducted at the Family Center for Research with Ubuntu, at Tygerberg Academic Hospital, a research center within Stellenbosch University in Cape Town, South Africa, Q4 2021. Phase 1b study objectives include evaluating the safety, tolerability, and immunogenicity of two intramuscular vaccinations approximately 2 months apart in HIV-infected children.

In the Phase 1 trial, CRV-101 demonstrated very robust immunogenicity as measured by humoral and cellular responses with no grade 3 injection site side effects and a 1.3% rate of grade 3 systemic side effects ("grade 3" side effects are those vaccination-related reactions severe enough to prevent normal activities).

Clinical Trials

No clinical trials found