Hannah Leslie
@h2leslie.bsky.social
Epidemiologist and health systems researcher at UCSF
Reposted by Hannah Leslie
[In approx] "117 million children born during 1994–2023, routine childhood vaccinations will have prevented approximately 508 million lifetime cases of illness, 32 million hospitalizations, and 1,129,000 deaths, at a net savings of $540 billion in direct costs and $2.7 trillion in societal costs."
Cutting childhood vaccines has nothing to do with “pro-business” politics. Some vaccines were added because they reduce suffering and deaths and keep parents from missing work. Chickenpox alone cost working parents ~4 days off per case.
Health and Economic Benefits of Routine Childhood...
This report describes health and economic benefits from routine childhood vaccines among children born during 1994–2023.
www.cdc.gov
December 20, 2025 at 1:51 PM
[In approx] "117 million children born during 1994–2023, routine childhood vaccinations will have prevented approximately 508 million lifetime cases of illness, 32 million hospitalizations, and 1,129,000 deaths, at a net savings of $540 billion in direct costs and $2.7 trillion in societal costs."
Reposted by Hannah Leslie
Which is why we are fighting for his impeachment.
Sign the petition, yell at your Congress critter, and send a quack-o-gram here:
standupforscience.net/impeach-rfkjr
Sign the petition, yell at your Congress critter, and send a quack-o-gram here:
standupforscience.net/impeach-rfkjr
December 20, 2025 at 1:39 AM
Which is why we are fighting for his impeachment.
Sign the petition, yell at your Congress critter, and send a quack-o-gram here:
standupforscience.net/impeach-rfkjr
Sign the petition, yell at your Congress critter, and send a quack-o-gram here:
standupforscience.net/impeach-rfkjr
Reposted by Hannah Leslie
ICE sprayed a one-year-old in the face with pepper spray.
The child and parents are US citizens, but that doesn't even matter.
These monsters pepper-sprayed a baby.
We cannot allow ICE to continue this behavior, and they aren't going to reform themselves.
www.washingtonpost.com/immigration/...
The child and parents are US citizens, but that doesn't even matter.
These monsters pepper-sprayed a baby.
We cannot allow ICE to continue this behavior, and they aren't going to reform themselves.
www.washingtonpost.com/immigration/...
December 15, 2025 at 3:24 AM
ICE sprayed a one-year-old in the face with pepper spray.
The child and parents are US citizens, but that doesn't even matter.
These monsters pepper-sprayed a baby.
We cannot allow ICE to continue this behavior, and they aren't going to reform themselves.
www.washingtonpost.com/immigration/...
The child and parents are US citizens, but that doesn't even matter.
These monsters pepper-sprayed a baby.
We cannot allow ICE to continue this behavior, and they aren't going to reform themselves.
www.washingtonpost.com/immigration/...
Reposted by Hannah Leslie
COVID vaccines slashed ER visits by 76% in kids 9 mos-4 yrs, and 56% in older kids, CDC's latest MMWR report found (reposting with story): www.scientificamerican.com/article/covi...
COVID Vaccines Slashed Kids’ ER Visits by 76 Percent, Study Finds
A report published by the CDC reaffirms the effectiveness of COVID vaccines at preventing severe disease in children
www.scientificamerican.com
December 11, 2025 at 9:31 PM
COVID vaccines slashed ER visits by 76% in kids 9 mos-4 yrs, and 56% in older kids, CDC's latest MMWR report found (reposting with story): www.scientificamerican.com/article/covi...
Reposted by Hannah Leslie
You know what else is a great way to stay healthy (and doesn’t involve embarrassing yourself at the airport?)
Vaccines.
Vaccines.
December 11, 2025 at 7:01 PM
You know what else is a great way to stay healthy (and doesn’t involve embarrassing yourself at the airport?)
Vaccines.
Vaccines.
Reposted by Hannah Leslie
@warren.senate.gov publishes a report listing all the $$ that Congress gave to DOD to do DOD things that DOD instead spent on Stephen Miller's snatch and grab.
As you look at these numbers, think how much cancer research could have been funded.
www.warren.senate.gov/imo/media/do...
As you look at these numbers, think how much cancer research could have been funded.
www.warren.senate.gov/imo/media/do...
December 10, 2025 at 10:51 PM
@warren.senate.gov publishes a report listing all the $$ that Congress gave to DOD to do DOD things that DOD instead spent on Stephen Miller's snatch and grab.
As you look at these numbers, think how much cancer research could have been funded.
www.warren.senate.gov/imo/media/do...
As you look at these numbers, think how much cancer research could have been funded.
www.warren.senate.gov/imo/media/do...
Reposted by Hannah Leslie
🚨 Today, I formally introduced articles of impeachment against Robert F. Kennedy, Jr.
RFK Jr. has turned his back on science and the safety of the American people. Michiganders cannot take another day of his chaos.
RFK Jr. has turned his back on science and the safety of the American people. Michiganders cannot take another day of his chaos.
December 10, 2025 at 1:10 PM
🚨 Today, I formally introduced articles of impeachment against Robert F. Kennedy, Jr.
RFK Jr. has turned his back on science and the safety of the American people. Michiganders cannot take another day of his chaos.
RFK Jr. has turned his back on science and the safety of the American people. Michiganders cannot take another day of his chaos.
Reposted by Hannah Leslie
Harvard School of Public Health Dean Andrea A. Baccarelli is a coward. Mary Bassett is a public health legend. www.thecrimson.com/article/2025...
Harvard Dismisses Director of FXB Center for Health and Human Rights | News | The Harvard Crimson
Harvard forced out the director of the François-Xavier Bagnoud Center for Health and Human Rights — another shakeup at a center whose programming on the Israel-Palestine conflict has been a flashpoint...
www.thecrimson.com
December 10, 2025 at 2:55 PM
Harvard School of Public Health Dean Andrea A. Baccarelli is a coward. Mary Bassett is a public health legend. www.thecrimson.com/article/2025...
Reposted by Hannah Leslie
WCHA disagrees with CDC’s Advisory Committee’s change to decades-long vaccine recommendation that has reduced pediatric hepatitis B infections by 99 percent.
doh.wa.gov/newsroom/wes...
doh.wa.gov/newsroom/wes...
West Coast Health Alliance, WA DOH, and Leading National Medical Organizations Continue to Recommend Hepatitis B Vaccination for Newborns
For immediate release: December 5, 2025 (25-145) Contact: DOH Communications
doh.wa.gov
December 6, 2025 at 12:52 AM
WCHA disagrees with CDC’s Advisory Committee’s change to decades-long vaccine recommendation that has reduced pediatric hepatitis B infections by 99 percent.
doh.wa.gov/newsroom/wes...
doh.wa.gov/newsroom/wes...
Reposted by Hannah Leslie
Sec. Kennedy must appear before the HELP Committee to explain why his vaccine advisory committee, in strong disagreement with the medical & scientific community, voted to end a decades-long recommendation that newborns receive the hepatitis B vaccine.
This vaccine saves lives.
This vaccine saves lives.
Breaking News: A federal vaccine committee voted to end the decades-long recommendation that all newborns be immunized at birth against hepatitis B, a highly infectious virus that leads to chronic liver disease in most infected children.
An End to Hepatitis B Shots for All Newborns
A federal panel voted on Friday to recommend halting the at-birth shots for all infants, in a step toward Health Secretary Robert F. Kennedy Jr.’s goal of upending the nation’s vaccine policy.
nyti.ms
December 5, 2025 at 6:42 PM
Sec. Kennedy must appear before the HELP Committee to explain why his vaccine advisory committee, in strong disagreement with the medical & scientific community, voted to end a decades-long recommendation that newborns receive the hepatitis B vaccine.
This vaccine saves lives.
This vaccine saves lives.
Reposted by Hannah Leslie
🦠What happens when you say you will only protect babies of infected moms, but you are bad at detecting infected moms❓
🚫You miss a lot of babies who needed protection.
This is exactly why in 1991 we went from only vaccinating babies of Hepatitis B positive moms to vaccinating all babies.
🚫You miss a lot of babies who needed protection.
This is exactly why in 1991 we went from only vaccinating babies of Hepatitis B positive moms to vaccinating all babies.
December 4, 2025 at 11:54 PM
🦠What happens when you say you will only protect babies of infected moms, but you are bad at detecting infected moms❓
🚫You miss a lot of babies who needed protection.
This is exactly why in 1991 we went from only vaccinating babies of Hepatitis B positive moms to vaccinating all babies.
🚫You miss a lot of babies who needed protection.
This is exactly why in 1991 we went from only vaccinating babies of Hepatitis B positive moms to vaccinating all babies.
Reposted by Hannah Leslie
Today’s action to weaken the birth-dose recommendation for the Hepatitis B vaccine disregards data supporting the effectiveness of the Hepatitis B vaccine, and creates confusion for parents about how best to protect their newborns. Full statement: spr.ly/633227f3XE
December 5, 2025 at 5:04 PM
Today’s action to weaken the birth-dose recommendation for the Hepatitis B vaccine disregards data supporting the effectiveness of the Hepatitis B vaccine, and creates confusion for parents about how best to protect their newborns. Full statement: spr.ly/633227f3XE
Reposted by Hannah Leslie
The Trump administration's decision to roll back universal Hepatitis B vaccine schedule recommendations will leave children vulnerable to unnecessary exposure and preventable illness. Read APHA's statement: www.apha.org/news-and-med...
December 5, 2025 at 5:29 PM
The Trump administration's decision to roll back universal Hepatitis B vaccine schedule recommendations will leave children vulnerable to unnecessary exposure and preventable illness. Read APHA's statement: www.apha.org/news-and-med...
Reposted by Hannah Leslie
Yo resisters!
Listen up for an #altCitizen #altPride history lesson about Brent Nicholson Earle (b.1951).
In the early AIDS years, long before the internets, before cell phones, before most of you were born, Earle did larger than life things you never heard of to raise awareness and #Pride. #1
Listen up for an #altCitizen #altPride history lesson about Brent Nicholson Earle (b.1951).
In the early AIDS years, long before the internets, before cell phones, before most of you were born, Earle did larger than life things you never heard of to raise awareness and #Pride. #1
June 15, 2025 at 4:37 AM
Yo resisters!
Listen up for an #altCitizen #altPride history lesson about Brent Nicholson Earle (b.1951).
In the early AIDS years, long before the internets, before cell phones, before most of you were born, Earle did larger than life things you never heard of to raise awareness and #Pride. #1
Listen up for an #altCitizen #altPride history lesson about Brent Nicholson Earle (b.1951).
In the early AIDS years, long before the internets, before cell phones, before most of you were born, Earle did larger than life things you never heard of to raise awareness and #Pride. #1
Reposted by Hannah Leslie
life IS lived forward
unless you die really prematurely and needlessly because of preventable diseases
unless you die really prematurely and needlessly because of preventable diseases
Anna also asked Cassidy directly: do you regret your vote for RFK Jr?
Cassidy declined to answer, saying “life is lived forward” and he’s focused on vaccine safety.
Cassidy declined to answer, saying “life is lived forward” and he’s focused on vaccine safety.
November 20, 2025 at 8:46 PM
life IS lived forward
unless you die really prematurely and needlessly because of preventable diseases
unless you die really prematurely and needlessly because of preventable diseases
Reposted by Hannah Leslie
“Since 1998, independent researchers have conducted more than 40 high-quality studies involving over 5.6 million people. The conclusion is clear and unambiguous: There’s no link between vaccines and autism." -Dr. Susan Kressly, AAP President on recent changes to the CDC's website
November 20, 2025 at 3:24 PM
“Since 1998, independent researchers have conducted more than 40 high-quality studies involving over 5.6 million people. The conclusion is clear and unambiguous: There’s no link between vaccines and autism." -Dr. Susan Kressly, AAP President on recent changes to the CDC's website
Reposted by Hannah Leslie
CDC has overhauled its website to assert that “the claim ‘vaccines do not cause autism’ is not an evidence-based claim”
November 20, 2025 at 2:26 AM
CDC has overhauled its website to assert that “the claim ‘vaccines do not cause autism’ is not an evidence-based claim”
Reposted by Hannah Leslie
RFK Jr had committed to Bill Cassidy, as a condition to win his vote, that he would keep website language.
Cassidy in February: “If confirmed… CDC will not remove statements on their website pointing out that vaccines do not cause autism.”
Note the language in second photo.
Cassidy in February: “If confirmed… CDC will not remove statements on their website pointing out that vaccines do not cause autism.”
Note the language in second photo.
November 20, 2025 at 2:42 AM
RFK Jr had committed to Bill Cassidy, as a condition to win his vote, that he would keep website language.
Cassidy in February: “If confirmed… CDC will not remove statements on their website pointing out that vaccines do not cause autism.”
Note the language in second photo.
Cassidy in February: “If confirmed… CDC will not remove statements on their website pointing out that vaccines do not cause autism.”
Note the language in second photo.
Reposted by Hannah Leslie
NEW: Epstein survivors release the most powerful PSA I have ever seen.
Make this go viral so every member of the House of Representatives sees it.
Make this go viral so every member of the House of Representatives sees it.
November 16, 2025 at 11:43 PM
NEW: Epstein survivors release the most powerful PSA I have ever seen.
Make this go viral so every member of the House of Representatives sees it.
Make this go viral so every member of the House of Representatives sees it.
Reposted by Hannah Leslie
I feel like I've seen this before:
November 15, 2025 at 3:56 PM
I feel like I've seen this before:
Reposted by Hannah Leslie
🚨Dept. of Education proposes to exclude public health degrees from the “professional degree” category.
That means new public health experts could lose access to key higher ed resources, like loan limits & reimbursement.
A bold strategy to let infectious diseases win! 🦠
aspph.org/department-o...
That means new public health experts could lose access to key higher ed resources, like loan limits & reimbursement.
A bold strategy to let infectious diseases win! 🦠
aspph.org/department-o...
Department of Education Proposal Excludes Public Health Degrees from “Professional Degree” Definition
Discover the new results and implications of Dept of Ed consensus regarding professional degree programs and public health education.
aspph.org
November 13, 2025 at 3:57 PM
🚨Dept. of Education proposes to exclude public health degrees from the “professional degree” category.
That means new public health experts could lose access to key higher ed resources, like loan limits & reimbursement.
A bold strategy to let infectious diseases win! 🦠
aspph.org/department-o...
That means new public health experts could lose access to key higher ed resources, like loan limits & reimbursement.
A bold strategy to let infectious diseases win! 🦠
aspph.org/department-o...
Reposted by Hannah Leslie
As expected, Canada has lost its measles-free status because of the long-running outbreak there. With it goes the #measles elimination status of the entire zone of the Americas, the only division of the #WHO to ever have achieved measles elimination. www.statnews.com/2025/11/10/m...
Canada loses measles elimination status — as does the entire Americas region
Canada has formally lost its measles elimination status, the country’s public health agency announced, triggering the loss of that status throughout all of the Americas.
www.statnews.com
November 10, 2025 at 2:49 PM
As expected, Canada has lost its measles-free status because of the long-running outbreak there. With it goes the #measles elimination status of the entire zone of the Americas, the only division of the #WHO to ever have achieved measles elimination. www.statnews.com/2025/11/10/m...
Reposted by Hannah Leslie
Hey kids the Trump Healthcare
Plan just dropped!
Plan just dropped!
November 8, 2025 at 2:13 PM
Hey kids the Trump Healthcare
Plan just dropped!
Plan just dropped!
Reposted by Hannah Leslie
Reposted by Hannah Leslie
For the record, once again, Portland is not burning to the ground. There is no insurrection here - that was on January 6 at the US Capitol.
Trump vows to ‘take care’ of Portland, calls protests ‘insurrection’
The president’s comments Thursday came as he awaits a federal court hearing on his effort to deploy federalized National Guard troops.
www.oregonlive.com
October 24, 2025 at 4:31 PM
For the record, once again, Portland is not burning to the ground. There is no insurrection here - that was on January 6 at the US Capitol.