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AstraZeneca expands its US COVID-19 vaccine trial

AstraZeneca Cambridge

Development of AstraZeneca’s COVID-19 vaccine AZD1222 expands into US Phase III clinical trial across all adult age groups.

The US trial, called D8110C00001, is funded by the Biomedical Advanced Development Authority (BARDA), part of the office of the Assistant Secretary for Preparedness and Response (ASPR) at the U.S. Department of Health and Human Services (HHS) and the National Institute of Allergy and Infectious Diseases (NIAID), part of the U.S. National Institutes of Health, and led by AstraZeneca. The NIAID-supported COVID-19 Prevention Network (CoVPN) will participate in the trial.

“We are pleased that AZD1222 demonstrated safety and immunogenicity across all adult age groups and are proud to be collaborating with BARDA and NIAID to accelerate the development of this vaccine. Should clinical trials demonstrate the vaccine protects against COVID-19 disease and is approved for use, we will work hard to make it globally available in a fair and equitable manner as rapidly as possible,” says Mene Pangalos, Executive Vice President, BioPharmaceuticals R&D, AstraZeneca.

Up to 30 000 adults

Trial centres across the US are recruiting up to 30,000 adults aged 18 years or over from diverse racial, ethnic and geographic groups who are healthy or have stable underlying medical conditions, including those living with HIV, and who are at increased risk of infection from the SARS-CoV-2 virus. Centres outside the US are included based on predicted transmission rates of the virus and sites in Peru and Chile are planned to initiate recruitment shortly.

Participants are being randomized to receive two doses of either AZD1222 or a saline control, four weeks apart, with twice as many participants receiving the potential vaccine than the saline control. The trial is assessing efficacy and safety of the vaccine in all participants, and local and systemic reactions and immune responses will be assessed in 3,000 participants.

Ongoing late stage clinical trials

Clinical development of AZD1222 is progressing globally with late-stage clinical trials ongoing in the UK, Brazil and South Africa and trials are planned to start in Japan and Russia. These trials, together with the US Phase III clinical trial will enroll up to 50,000 participants globally.

Results from the late-stage trials are anticipated later this year, depending on the rate of infection within the clinical trial communities.

Results from Phase I/II COV001

In July 2020, interim results from the ongoing Phase I/II COV001 trial were published in The Lancet and showed AZD1222 was tolerated and generated robust immune responses against the SARS-CoV-2 virus in all evaluated participants.

AstraZeneca continues to engage with governments, multilateral organisations and partners around the world to ensure broad and equitable access to the vaccine, should clinical trials prove successful, it states. Recent supply announcements with Russia, South Korea, Japan, China, Latin America and Brazil take the global supply capacity towards three billion doses of the vaccine.

Photo: AstraZeneca Cambridge

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