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Recommendations

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About RSV

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Infants at Risk

Individuals ≥ 60 Years of Age

About ABRYSVO

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MATISSE Study Design

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Study Design

Definitions

Tab Number 3

Tab Number 4

Tab Number 5

MATISSE trial design1A trial evaluating ABRYSVO in healthy pregnant individuals ≤ 49 years of age

A Phase 3, multicentre, randomized, double-blind, placebo-controlled global study.

Adapted from the ABRYSVO Product Monograph.1

The study objective was the assessment of vaccine efficacy defined as the RRR in the ABRYSVO group vs. placebo for infant participants born to maternal participants receiving one dose of ABRYSVO. 

The following two primary efficacy endpoints were assessed in parallel within 
90/120/150/180 days after birth:

  • Severe RSV-positive MA LRTD
  • RSV-positive MA LRTD
MATISSE definitions1

RSV-positive LRTI and severe RSV-positive LRTI were both defined as a medically attended visit with RT-PCR confirmed RSV illness with the following criteria:

Check out the MATISSE trial for more information.

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RRR: relative risk reduction; RSV: respiratory syncytial virus; MA: medically attended; LRTD: lower respiratory tract disease; RT-PCR: reverse transcription-polymerase chain reaction

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Reference:ABRYSVO Product Monograph. Pfizer Canada ULC. May 29, 2024.
PP-A1G-CAN-0117-EN

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