Dr. Sean Mullen ✓
@drseanmullen · Illinois, USA · joined 02 Dec 2009
Professor. Scientist. Builder. | Director @EtcLab | Exercise × cognition × health tech | Clean air + public health | Tennis coach | Husband + Dad | Merlin 🧙♂️
33 132Followers
7 484Following
39 949Posts total
3.3MViews on collected posts
Latest posts
Looking for new posts…
@drseanmullen Outstanding summary of the pandemic and the failures of public health officials. What a nightmare, except this is real.
320 views · 34 likes
· 2 reposts · 0 replies
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And maybe that’s the part I find most impressive.
Not that SARS-CoV-2 disappeared.
It didn’t.
Not that Long COVID disappeared.
It didn’t.
We disappeared them culturally.
We changed the vocabulary until the crisis sounded historical.
Changed the surveillance until the
3.8K views · 268 likes
· 79 reposts · 15 replies
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You’ve got to hand it to them.
They changed the language.
Changed the guidance.
Changed the metrics.
Changed the dashboards.
Changed what counted.
Changed what we counted.
Spent months arguing droplets while the virus rode the fucking air.
Then eventually
Oh.
Ventilation.
30.2K views · 1.1K likes
· 414 reposts · 38 replies
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Now do Covid and air quality inside NYC buildings, Mr Mayor. The air isn’t safe and it isn’t getting any better.
4.5K views · 481 likes
· 93 reposts · 4 replies
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Alcaraz vs Shelton
That first set was unreal!
873 views · 8 likes
· 0 reposts · 1 replies
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I built an Adult Literacy Program for a guy on the spectrum who reads at a 1st-grade level. If you know someone who can use it, be my guest.
Now if only I could get people to wear a mask to protect their ability to remember what they read.
https://t.co/P8v6q2reiJ
1.4K views · 79 likes
· 14 reposts · 4 replies
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When they say “learning loss” like it’s a skipped level in virtual reality with no ties to intentionally sending children back to schools to huff a well-established neuroinvasive pathogen that causes cognitive impairment, the steam engine in my brain becomes audible.
2.8K views · 118 likes
· 23 reposts · 2 replies
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@ijsimo25 Sorry, I should have been more precise:
A lingering impact of Covid-era learning loss is certainly possible in some cases. But last time around many people specifically said the 2022 results were likely a one-off Covid hit and 2025 would rebound.
39.2K views · 226 likes
· 6 reposts · 29 replies
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I asked ChatGPT to predict the future based on a novel virus that parallels the outcomes associated with SARS-CoV-2 (but I omitted the name to avoid misinformation). Remember, GPT aced medical exams and there are only a handful of people who’ve been screaming from the rooftops
662.1K views · 4K likes
· 1.5K reposts · 203 replies
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There’s a critical aspect of SARS-CoV-2 infection that many still don't grasp. This virus has a way of affecting us all differently, but one thing is increasingly clear: children are alarmingly MORE susceptible to airborne pathogens like TB, RSV, and pneumonia. The reason? Their
430.7K views · 5.1K likes
· 1.9K reposts · 256 replies
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“Covid is over.”
“Covid is a nothing-burger.”
Let’s run a simulation to see how long it’ll take before the majority of the population has persistent infection/chronic disease [LongCovid] with the following assumptions:
Initial Infection:
•67% of the US population has had Covid
1.1M views · 3.2K likes
· 961 reposts · 578 replies
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@drseanmullen The parallels of this pandemic to the timeline of events relating to HIV/AIDS public health response are staggering and disheartening. If the timeline is comparable, we won’t see adequate movement for at least a decade. I truly hope that’s not the case.
15.4K views · 381 likes
· 31 reposts · 8 replies
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I always wondered what it was like for scientists trying to pull the curtain down to expose AIDS or that tobacco causes cancer.
This is it. We’re living in truly wild times.
933.3K views · 9.9K likes
· 1.9K reposts · 444 replies
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Against accounts of the same size
8 posts from the last 90 days, next to the 10K–100K follower range. shown far beyond its own audience, and the audience reacts.
Median views3 320this account955median for 10K–100K
Reach, %10.02%this account3.50%median for 10K–100K
Engagement, %6.18%this account1.57%median for 10K–100K
| Metric | This account | Median for 10K–100K | Ratio |
|---|---|---|---|
| Median views per post | 3 320 | 955 | 3.48× |
| Reach (views ÷ followers) | 10.02% | 3.50% | 2.86× |
| Engagement rate | 6.18% | 1.57% | 3.94× |
Others in this range → Compare with another account → How these benchmarks are built →
Growth & engagement
How the posts we collected actually performed: views and reaction rate post by post, what the audience did with them, and where the follower count goes.
Views per post
1.1M28 Aug
430.7K29 Nov
662.1K2 Dec
21.2K
16.4K8 Dec
11.9K21 Dec
39.2K8 Sep
2.8K
1.4K
8739 Sep
4.5K
30.2K16 Sep
3.8K
32017 Sep
Last 14 collected posts, oldest on the left. The scale is logarithmic: one post can outrun the rest a hundred times over.
Engagement rate per post
0.42%28 Aug
1.69%29 Nov
0.85%2 Dec
0.40%
0.32%8 Dec
0.26%21 Dec
0.67%8 Sep
5.04%
7.00%
1.03%9 Sep
12.72%
5.36%16 Sep
9.66%
11.25%17 Sep
Reactions — likes, reposts, replies and quotes — divided by views. Median for 10K–100K accounts is 1.57%.
What the audience does
Likes72.4%25 069 in total
Reposts20.0%6 939 in total
Replies4.6%1 586 in total
Quotes0.2%56 in total
Bookmarks2.8%977 in total
Share of every reaction we collected for this account. Replies mean argument, reposts mean endorsement, bookmarks mean the post was worth keeping.
Followers by day
9 Sep
Daily snapshots since 09 Sep 2026; the dashed line is the starting count.
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