This week (April 22–29) is World PI Week, the global campaign raising awareness and driving action around Primary Immunodeficiencies — a group of over 550 conditions where part of the immune system is missing or doesn't function correctly. I'm sharing this as someone who just got home from my first hospital stay for pneumonia the day before this campaign kicked off, which feels like the universe making a point 😅
The numbers are staggering:
- An estimated 6 million people worldwide live with a Primary Immunodeficiency
- 70–90% of them are still undiagnosed — often waiting years before anyone connects the dots
- The average diagnostic delay is two years — though many people, myself included, go undiagnosed well into their 30s and 40s. That's decades of preventable suffering, when effective treatments already exist.
This year's campaign theme is "We Can't Wait" — shifting from raising awareness to demanding action: earlier diagnosis, better treatment access, and real policy reform.
Watch the 2-minute campaign video here
Ways you can help, wherever you are:
📢 Share the campaign — post the video, share campaign materials from worldpiweek.org, use #WorldPIWeek2026 and #WeCantWait
🩸 Donate plasma — IgG therapy, a lifesaving treatment for many with PI, is made entirely from donor plasma and can't be collected from whole blood donations. Regular plasma donors literally save lives.
🔍 Notice the patterns — do you or someone you love have a history of frequent infections, slow recovery, or just always being sick? That pattern matters. Bring it up with a doctor and ask specifically about immune testing.
🦓 Advocate for better medical education — doctors are traditionally taught "when you hear hoofbeats, think horses not zebras," meaning assume the common explanation before the rare one. But rare diseases are only rare until they're diagnosed, and patients with PI are often dismissed for years because no one looked for the zebra. Push for healthcare providers in your life and community to ask the harder questions.
💉 Support vaccines and push back on misinformation — people with PI often can't mount a full immune response even with vaccination, which means they rely on the people around them being vaccinated to stay safe. For our community, herd immunity isn't a political position — it's a medical reality. When misinformation discourages vaccination, immunocompromised people pay the price. That's not opinion, it's immunology.
🏛️ US folks: contact your representatives — let your state and federal lawmakers know that World PI Week exists, that rare immune diseases affect millions of Americans, and that coordinated access to diagnosis and treatment needs to be a healthcare priority. You can find your representatives here
🌍 Outside the US: find your regional PI organization and see what action looks like in your country
I'll share more in the comments, including my own diagnosis story. I'm always happy to answer questions and share resources!