SARS-CoV-2 Vaccine Clinical Trials Using ACTIV-Informed Harmonized Protocols

ACTIV advised on the protocol designs and endpoints to ensure a harmonized approach across multiple vaccine efficacy trials. The protocol enables analyses of correlates of protection across several vaccine trials being implemented under The Operation (formerly known as Operation Warp Speed) and activated at sites that are part of the NIH COVID-19 Prevention Network.

As vaccine clinical trials using these harmonized protocols are launched, NIH will list those studies on this page.

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SARS-CoV-2 Vaccine Clinical Trials Using

Harmonized Protocols Informed by ACTIV

photo of a doctor giving an injection to a patient
Agent Trial Phase Description More Information

Adjuvanted recombinant protein-based vaccine

Phase 1/2

Co-developed by Sanofi and GlaxoSmithKline,听this vaccine uses a recombinant protein-based technology. Participants will receive either a single intramuscular injection or two injections 21 days apart.The study expects to enroll 440 participants.

AZD1222

Phase 3

Developed by Oxford University鈥檚 Jenner Institute and Oxford Vaccine Group, and licensed to AstraZeneca for further development,听this vaccine uses a non-replicating adenovirus delivery system. Participants will receive two intramuscular injections approximately 4 weeks apart. The study expects to enroll about 30,000 volunteers.

JNJ-78436725
(Ad.26.COV2.S)

Phase 3

Developed by听Janssen Pharmaceutical Companies of Johnson & Johnson,听this vaccine uses a non-replicating adenovirus delivery system. Participants will receive a single intramuscular injection. The study expects to enroll up to 60,000 volunteers.

mRNA-1273.351

Phase 1

Developed by Moderna, Inc., this vaccine听uses the messenger RNA delivery platform and is听designed to protect against the B.1.351 SARS-CoV-2 variant. Participants will receive varying dosages. The study expects to enroll 60 volunteers who already have received the mRNA-1273 vaccine and 150 volunteers听who have not received any COVID-19 vaccine.听

mRNA-1273

Phase 3

Co-developed by Moderna, Inc., and NIAID,听this vaccine uses the messenger RNA delivery platform. Participants will receive two intramuscular injections 28 days apart. The study expects to enroll about 30,000 volunteers.
NVX-CoV2373 Phase 3 Developed by Novavax, Inc., this protein subunit vaccine听was made using recombinant nanoparticle technology. Participants will receive two intramuscular injections 21 days apart. The study expects to enroll about 30,000 volunteers.

This page last reviewed on July 6, 2023