22nd-29th April 2021

Millions of people live with a compromised immune system worldwide due to a genetic defect. Together, we can make a difference in their lives by stimulating early diagnosis and access to care.

World PI Week 2021 embraced three main topics:

Raising awareness of defects of the immune system such as PID takes on an even greater significance amid COVID-19.

Join the campaign, help make a difference! Strike a Y, show support to the PID cause!

World PI Week promotes:

  • Solidarity, togetherness & collaboration
  • Awareness & education
  • Investment, political attention & action
  • Research & innovation

Find all World PI Week general materials here.

The World PI Week 2021 outcome report is available here.

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Recent News

  • Contribute a picture for the World PI Week 2022 poster!


  • World PI Week 2021 highlights: the campaign report is now out!


  • Announcing the winner of the 2021 photo contest


  • Ways to join World PI Week 2021


  • Join the World PI Week photo contest 2021


  • Webinar: Let’s mark the start of World PI Week 2021 together!


See all World PI Week updates