Last reviewed · How we verify

ChAdOx1 nCoV-19 two dose + paracetamol

University of Oxford · Phase 3 active Biologic

ChAdOx1 nCoV-19 is a viral vector vaccine that delivers the SARS-CoV-2 spike protein gene to stimulate immune responses against COVID-19.

ChAdOx1 nCoV-19 is a viral vector vaccine that delivers the SARS-CoV-2 spike protein gene to stimulate immune responses against COVID-19. Used for COVID-19 prevention in adults (Phase 3).

At a glance

Generic nameChAdOx1 nCoV-19 two dose + paracetamol
SponsorUniversity of Oxford
Drug classViral vector vaccine
TargetSARS-CoV-2 spike protein
ModalityBiologic
Therapeutic areaImmunology / Infectious Disease
PhasePhase 3

Mechanism of action

The vaccine uses a replication-deficient chimpanzee adenovirus (ChAdOx1) as a vector to carry genetic instructions for the SARS-CoV-2 spike protein into host cells. This triggers both cellular and humoral immune responses, generating T-cell and antibody-mediated immunity against the virus. Paracetamol is co-administered as an antipyretic/analgesic to manage common post-vaccination symptoms.

Approved indications

Common side effects

Key clinical trials

Primary sources

Every claim on this page is sourced from regulatory or scientific primary sources. See our editorial policy for full methodology.

SourceUsed for
ClinicalTrials.govTrial enrolment, design, endpoints, results

Competitive intelligence

For the full competitive landscape — auto-detected comparators, recent regulatory actions across the set, upcoming PDUFA, patent timeline, sponsor landscape: