Mary Landrigan-Ossar, MD, PhD
@mlandriganossar.medsky.social
Peds anesthesia, FAAP, FASA
President, Society for Pediatric Sedation pedsedation.org
Full-time ally 🏳️🌈🏳️⚧️, raised my kids snarky
President, Society for Pediatric Sedation pedsedation.org
Full-time ally 🏳️🌈🏳️⚧️, raised my kids snarky
Reposted by Mary Landrigan-Ossar, MD, PhD
“A team led by researchers at the University of Waterloo found in a simulated study that ChatGPT-4o, the well-known large language model (LLM) created by OpenAI, answered open-ended diagnostic questions incorrectly nearly two-thirds of the time.”
Don’t use AI for medical advice.
#Canada
#AI
Don’t use AI for medical advice.
#Canada
#AI
AI’s medical diagnostic skills still need a check-up | Waterloo News
You may want to think twice about using powerful artificial intelligence (AI) programs such as ChatGPT to self-diagnose health problems. A team led by researchers at the University of Waterloo found i...
uwaterloo.ca
November 4, 2025 at 12:23 PM
Reposted by Mary Landrigan-Ossar, MD, PhD
“This study shows conclusively that the HPV vaccine prevents the changes that can develop into cancer. It also emphasises the need for continued high uptake of the vaccine"
Another study shows continued effectiveness for the HPV vaccine - #MedSky.
publichealthscotland.scot/news/2025/no...
Another study shows continued effectiveness for the HPV vaccine - #MedSky.
publichealthscotland.scot/news/2025/no...
New study shows long-term effectiveness of HPV vaccine - News - Public Health Scotland
An encouraging new study by Public Health Scotland, in collaboration with the Universities of Edinburgh and Strathclyde, confirms the human papillomavirus (HPV) vaccine provides strong and sustained p...
publichealthscotland.scot
November 4, 2025 at 11:02 PM
“This study shows conclusively that the HPV vaccine prevents the changes that can develop into cancer. It also emphasises the need for continued high uptake of the vaccine"
Another study shows continued effectiveness for the HPV vaccine - #MedSky.
publichealthscotland.scot/news/2025/no...
Another study shows continued effectiveness for the HPV vaccine - #MedSky.
publichealthscotland.scot/news/2025/no...
Reposted by Mary Landrigan-Ossar, MD, PhD
Let's try something new.
If you donate to a food bank and tell me how much and which one, I'll match your donation.
If it's less than $50, I'll round up.
Tag me, reply here, or DM if you prefer.
Why food banks? Because if we want to survive a general strike, we need to keep people fed.
If you donate to a food bank and tell me how much and which one, I'll match your donation.
If it's less than $50, I'll round up.
Tag me, reply here, or DM if you prefer.
Why food banks? Because if we want to survive a general strike, we need to keep people fed.
Now is a really good time to donate to food banks, and do food runs for mutual aid groups. Also, do menstrual product runs.
I wonder how much food theft spikes with desperate people just trying to feed their families. I'm sure there will be a media panic about it.
October 23, 2025 at 5:04 AM
Let's try something new.
If you donate to a food bank and tell me how much and which one, I'll match your donation.
If it's less than $50, I'll round up.
Tag me, reply here, or DM if you prefer.
Why food banks? Because if we want to survive a general strike, we need to keep people fed.
If you donate to a food bank and tell me how much and which one, I'll match your donation.
If it's less than $50, I'll round up.
Tag me, reply here, or DM if you prefer.
Why food banks? Because if we want to survive a general strike, we need to keep people fed.
Reposted by Mary Landrigan-Ossar, MD, PhD
another great idea! just search diaper bank + your city to find one.
Please direct people to their local Diaper Bank. They collect unused diapers (kid outgrew newborn size but you still have half a pack left etc) & menstrual hygiene products to redistribute free to those in need. Post menopause, I donated my unopened tampon boxes there. Someone can use them!
November 1, 2025 at 5:01 PM
another great idea! just search diaper bank + your city to find one.
Reposted by Mary Landrigan-Ossar, MD, PhD
The unthinkable has happened. Through generations of service under administrations from both parties, America's food assistance program has never been allowed to fail U.S. families—until today, and this Trump shutdown.
November 1, 2025 at 5:42 PM
The unthinkable has happened. Through generations of service under administrations from both parties, America's food assistance program has never been allowed to fail U.S. families—until today, and this Trump shutdown.
Reposted by Mary Landrigan-Ossar, MD, PhD
if you think your food banks are fine, they aren’t. the demand is overwhelming and the supply is dwindling
Food banks were already struggling to keep with demand. Then, Trump slashed $1 billion from crucial USDA programs supporting them.
Now, thanks to his shutdown, food assistance for millions of Americans is about to try up.
The perfect storm of cruelty.
Now, thanks to his shutdown, food assistance for millions of Americans is about to try up.
The perfect storm of cruelty.
Food banks were ‘operating on fumes’ even before SNAP chaos • Stateline
Even before the federal government shutdown posed an unparalleled challenge for food banks, nonprofits across the countr
stateline.org
November 1, 2025 at 5:59 PM
if you think your food banks are fine, they aren’t. the demand is overwhelming and the supply is dwindling
Reposted by Mary Landrigan-Ossar, MD, PhD
Food bank director: “for every meal that a food bank provides, the SNAP program provides nine. There’s no way we can meet that gap.”
October 27, 2025 at 4:30 PM
Food bank director: “for every meal that a food bank provides, the SNAP program provides nine. There’s no way we can meet that gap.”
Reposted by Mary Landrigan-Ossar, MD, PhD
i share this mayo clinic video every year because more people need to see and hear how horrific a disease whooping cough is
September 13, 2025 at 1:46 PM
i share this mayo clinic video every year because more people need to see and hear how horrific a disease whooping cough is
Reposted by Mary Landrigan-Ossar, MD, PhD
RFK Jr’s gobbledygook is probably confusing for a lot of people. He talks about kids who have been vaccinated having less brightness in their eyes or having “mitochondrial challenges.” What he ignores is their greater likelihood of survival, as evidenced by any modern cemetery.
September 2, 2025 at 4:36 PM
RFK Jr’s gobbledygook is probably confusing for a lot of people. He talks about kids who have been vaccinated having less brightness in their eyes or having “mitochondrial challenges.” What he ignores is their greater likelihood of survival, as evidenced by any modern cemetery.
Reposted by Mary Landrigan-Ossar, MD, PhD
Plastic pellets are often mistaken for fish eggs by marine animals, who eat them. Ingesting plastic can be harmful on its own but, as Prof Mudge explains, plastic readily absorbs pollutants, exposing fish who eat them to those chemicals, which may be, in turn, passed to people who eat the fish.
July 30, 2025 at 5:12 PM
Plastic pellets are often mistaken for fish eggs by marine animals, who eat them. Ingesting plastic can be harmful on its own but, as Prof Mudge explains, plastic readily absorbs pollutants, exposing fish who eat them to those chemicals, which may be, in turn, passed to people who eat the fish.
Reposted by Mary Landrigan-Ossar, MD, PhD
He helped the families of dying children. Spent all night with them even once the child was taken to the morgue. A former colleague tells us on the record that Ayman Soliman is the reason certain poor families who lost their babies at the hospital didn’t have…
www.rollingstone.com/politics/pol...
www.rollingstone.com/politics/pol...
July 23, 2025 at 6:52 PM
He helped the families of dying children. Spent all night with them even once the child was taken to the morgue. A former colleague tells us on the record that Ayman Soliman is the reason certain poor families who lost their babies at the hospital didn’t have…
www.rollingstone.com/politics/pol...
www.rollingstone.com/politics/pol...
Reposted by Mary Landrigan-Ossar, MD, PhD
💊🧵Today’s FDA “hearing” on antidepressants confirmed that RFKJ and his FDA want to limit or even remove access to antidepressants, particularly for pregnant people. The hearing focused on selective serotonin reuptake inhibitors (SSRI) but the MAHA report makes false claims about all antidepressants.
July 22, 2025 at 2:20 AM
💊🧵Today’s FDA “hearing” on antidepressants confirmed that RFKJ and his FDA want to limit or even remove access to antidepressants, particularly for pregnant people. The hearing focused on selective serotonin reuptake inhibitors (SSRI) but the MAHA report makes false claims about all antidepressants.
Reposted by Mary Landrigan-Ossar, MD, PhD
Queensland's annual flu epidemic has resulted in the need to close a range of surgical procedures due to being overwhelmed by predominantly unvaccinated serious cases.
It's not too late to get vaccinated team! It's safe and it can help prevent severe disease.
www.abc.net.au/news/2025-07...
It's not too late to get vaccinated team! It's safe and it can help prevent severe disease.
www.abc.net.au/news/2025-07...
a man is laying his head on a desk with his hands on the desk .
ALT: a man is laying his head on a desk with his hands on the desk .
media.tenor.com
July 16, 2025 at 9:21 AM
Queensland's annual flu epidemic has resulted in the need to close a range of surgical procedures due to being overwhelmed by predominantly unvaccinated serious cases.
It's not too late to get vaccinated team! It's safe and it can help prevent severe disease.
www.abc.net.au/news/2025-07...
It's not too late to get vaccinated team! It's safe and it can help prevent severe disease.
www.abc.net.au/news/2025-07...
This is no good no good no good
Breaking News: Measles cases have hit a record high this year surpassing any other since the contagious virus was declared eliminated in the U.S. in 2000.
Measles Cases Hit Record High Since U.S. Eliminated Disease
Experts worry that if vaccination rates do not improve, deadly outbreaks will become the new normal.
trib.al
July 9, 2025 at 3:57 PM
This is no good no good no good
Reposted by Mary Landrigan-Ossar, MD, PhD
Our analysis, which shows that more women nearly bled to death during miscarriage after Texas banned abortion, adds to a growing body of reporting revealing that maternal outcomes have gotten worse under bans.
Miscarriage Is Increasingly Dangerous for Women in Texas, Our Analysis Shows. Here’s How We Did It.
Using seven years of hospital discharge data, we found that the number of blood transfusions during emergency room visits for first-trimester miscarriage shot up by 54% since Texas banned abortion.
www.propublica.org
July 3, 2025 at 1:30 AM
Our analysis, which shows that more women nearly bled to death during miscarriage after Texas banned abortion, adds to a growing body of reporting revealing that maternal outcomes have gotten worse under bans.
Reposted by Mary Landrigan-Ossar, MD, PhD
“I represent 67,000 pediatricians, and let me be clear: this bill will devastate children’s health,” said Dr. Susan Kressly, President of @ameracadpeds.bsky.social “Kids are 22% of our population—but 100% of our future. We cannot afford to fail them.”
Call your senators and demand a NO vote.
Call your senators and demand a NO vote.
June 29, 2025 at 11:31 PM
“I represent 67,000 pediatricians, and let me be clear: this bill will devastate children’s health,” said Dr. Susan Kressly, President of @ameracadpeds.bsky.social “Kids are 22% of our population—but 100% of our future. We cannot afford to fail them.”
Call your senators and demand a NO vote.
Call your senators and demand a NO vote.
Reposted by Mary Landrigan-Ossar, MD, PhD
Our paper: since SCOTUS McDonald v. Chicago decision, states w/permissive firearm laws have had thousands of excess pediatric firearm deaths.
📊 6,029 excess deaths in the most permissive states
📈 Especially sharp rise among Black children
🔗 jamanetwork.com/journals/jam... @jeremyfaust.bsky.social
📊 6,029 excess deaths in the most permissive states
📈 Especially sharp rise among Black children
🔗 jamanetwork.com/journals/jam... @jeremyfaust.bsky.social
Firearm Laws and Pediatric Mortality in the US
This study attempts to measure excess mortality due to firearms among US children aged 0 to 17 years after the McDonald v Chicago US Supreme Court decision (2010).
jamanetwork.com
June 9, 2025 at 9:11 PM
Our paper: since SCOTUS McDonald v. Chicago decision, states w/permissive firearm laws have had thousands of excess pediatric firearm deaths.
📊 6,029 excess deaths in the most permissive states
📈 Especially sharp rise among Black children
🔗 jamanetwork.com/journals/jam... @jeremyfaust.bsky.social
📊 6,029 excess deaths in the most permissive states
📈 Especially sharp rise among Black children
🔗 jamanetwork.com/journals/jam... @jeremyfaust.bsky.social
Reposted by Mary Landrigan-Ossar, MD, PhD
“Immunizations work, they are very effective and safe, and they save lives. Vaccines are among the most rigorously studied and effective tools in public health.”
Kudos to AAFP, AAP, ACOG, ACP, IDSA for this.
www.statnews.com/2025/06/26/v...
Kudos to AAFP, AAP, ACOG, ACP, IDSA for this.
www.statnews.com/2025/06/26/v...
We will not stay silent on vaccines, say leaders of five major U.S. medical associations
“We cannot and will not gamble with our patients’ health or the health of our communities,” write the presidents of the AAFP, AAP, ACP, ACOG, and IDSA.
www.statnews.com
June 26, 2025 at 8:30 PM
“Immunizations work, they are very effective and safe, and they save lives. Vaccines are among the most rigorously studied and effective tools in public health.”
Kudos to AAFP, AAP, ACOG, ACP, IDSA for this.
www.statnews.com/2025/06/26/v...
Kudos to AAFP, AAP, ACOG, ACP, IDSA for this.
www.statnews.com/2025/06/26/v...
Reposted by Mary Landrigan-Ossar, MD, PhD
Happy 10 years of Marriage Equality and the Obergefell decision! Our hero on Gay of the Day is the man himself, Jim Obergefell! share his story so the world remembers why we fight for equality in the first place! 🏳️⚧️🏳️🌈❤️#lgbtq #pridemonth #pride #history #equality
June 26, 2025 at 12:18 PM
Happy 10 years of Marriage Equality and the Obergefell decision! Our hero on Gay of the Day is the man himself, Jim Obergefell! share his story so the world remembers why we fight for equality in the first place! 🏳️⚧️🏳️🌈❤️#lgbtq #pridemonth #pride #history #equality
Reposted by Mary Landrigan-Ossar, MD, PhD
Yesterday, RFK Jr announced the U.S. wouldn't continue to support Gavi, the leading international vaccine organization.
I had a lot of thoughts, so I put them in my first ever Substack.
tl;dr—this is RFK Jr taking his anti-vaccine crusade global.
Read it here:
open.substack.com/pub/craigasp...
I had a lot of thoughts, so I put them in my first ever Substack.
tl;dr—this is RFK Jr taking his anti-vaccine crusade global.
Read it here:
open.substack.com/pub/craigasp...
June 26, 2025 at 4:50 PM
Yesterday, RFK Jr announced the U.S. wouldn't continue to support Gavi, the leading international vaccine organization.
I had a lot of thoughts, so I put them in my first ever Substack.
tl;dr—this is RFK Jr taking his anti-vaccine crusade global.
Read it here:
open.substack.com/pub/craigasp...
I had a lot of thoughts, so I put them in my first ever Substack.
tl;dr—this is RFK Jr taking his anti-vaccine crusade global.
Read it here:
open.substack.com/pub/craigasp...
Reposted by Mary Landrigan-Ossar, MD, PhD
Too many vaccines in the first year?Your child is 44% more likely to survive to one year if they are vaccinated than if they are unvaccinated.
They’re forming a CDC workgroup to decide which line on this graph looks better and their answer may surprise you
June 25, 2025 at 5:18 PM
Too many vaccines in the first year?Your child is 44% more likely to survive to one year if they are vaccinated than if they are unvaccinated.
Reposted by Mary Landrigan-Ossar, MD, PhD
Vaccination schedules on the CDC website have already started changing under RFK Jr. So we published a guide to the evidence-based vaccine recommendations in place *before* all 17 members of the advisory panel were abruptly dismissed by the new admin. www.scientificamerican.com/article/see-... 🧪
Here’s Your Cheat Sheet for Vaccine Recommendations Backed by Science
These graphics will guide you through science-based vaccine guidelines for children and adults
www.scientificamerican.com
June 25, 2025 at 11:49 AM
Vaccination schedules on the CDC website have already started changing under RFK Jr. So we published a guide to the evidence-based vaccine recommendations in place *before* all 17 members of the advisory panel were abruptly dismissed by the new admin. www.scientificamerican.com/article/see-... 🧪