We already knew that severe acute #COVID19 is induced by pathogenic IgG. But now Lynn Mes & @oliverch77.bsky.social show in @eurjimmunol.bsky.social that IgA2 adds even more fuel to the fire 🔥: onlinelibrary.wiley.com/doi/10.1002/...

Long COVID patients show immunological imprinting and impaired antibody class switching: fewer IgG/IgA antibodies against SARS-CoV-2 spike, but more against seasonal coronaviruses.
Interesting finding by my PhD student Ashwin Mak in J Med Virol: onlinelibrary.wiley.com/doi/10.1002/... 1/6

Big thanks to @keystonesymposia.bsky.social @virusesimmunity.bsky.social @ahandvanish.bsky.social @daltmann.bsky.social and others for organization of the second #LongCOVID Keystone #KSLongCOVID26. I’ll mention a few personal highlights. 1/

Huge congratulations to my talented postdoc @oliverch77.bsky.social on obtaining the prestigious Veni grant! On your way to start your own research group 🙂. www.zonmw.nl/en/news/200-...

For people that suffer from post-COVID-19 dizziness (as their ONLY symptom), this case report may be of interest to you: casereports.bmj.com/content/18/6.... A tale from personal experience… 1/10

All presentations of the #mecfsconference are now online! Thanks again to @scheibenbogen.bsky.social for organizing this, and bringing so many experts together. Check out the videos at: events.mecfs-research.org/en/events/co.... #MECFS #LongCovid
www.youtube.com/watch?v=k4m4...

My team is very much looking forward to join the @keystonesymposia.bsky.social on #LongCovid and other PAIS (2 talks, 3 posters). Organized by @virusesimmunity.bsky.social @ahandvanish.bsky.social on Aug 10-13 2025 in Santa Fe: www.keystonesymposia.org/conferences/...

As presented at the International ME/CFS Conference 2025 #mecfsconference, in the @amsterdamumc.bsky.social we will start a clinical trial testing immunoadsorption in Long-COVID. More information about that in this movie: www.youtube.com/watch?v=fE7A... #LongCOVID #MECFS #ZonMw

I’m really impressed by the high level of research that was presented at the International ME/CFS Conference 2025 #mecfsconference, organized by the great @scheibenbogen.bsky.social: events.mecfs-research.org/en/events/co.... I’ll mention a few (personal) highlights: 1/7

It was such a pleasure to have @resiapretorius.bsky.social over @amsterdamumc.bsky.social! Happy to see the #microclots assays worked right away 😀. We can now screen and select #LongCovid patients, to see whether we can also detect microclots using total body PET scan (powered by #ZonMw).

In a series of 4 video’s, I was interviewed about our work on #MECFS and post-acute infection syndromes #PAIS (in Dutch). Part one is now online, the others will follow in the next weeks. Big thanks to @mecentraal.bsky.social and the NMCB for arranging this. www.youtube.com/watch?v=em9e...

It’s about time I activate my account on BlueSky. Hi everyone, I’m Jeroen den Dunnen, immunologist and Head of Department @amsterdamumc.bsky.social. I study the function of antibodies in many diseases, but recently I’m mostly known for my work on:
(1/3)