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Yaneer Bar-Yam

@yaneerbaryam.bsky.social
11K followers 196 following 307 posts

Complex Systems Physicist | President of NECSI, co-founder World Health Network (WHN) Author: Making Things Work (download pdf at necsi.edu/making-things-work)

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Yaneer Bar-Yam @yaneerbaryam.bsky.social · 24/09/2026
Spread the word: It’s time for respirator-quality masks in Michigan—and many other states. It’s also a timely moment for an update on your COVID vaccine. www.freep.com/story/news/h...
freep.com
Michigan, much of the U.S. in COVID-19 surge
Michigan and dozens of other states are in the midst of a COVID-19 surge, according to a new map from the Pandemic Mitigation Collaboration.
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Yaneer Bar-Yam @yaneerbaryam.bsky.social · 23/09/2026
Important coverage from CTV News: Outdated assumptions about airborne transmission have shaped and continue to shape the response to COVID and infection-control policies more broadly We know COVID is airborne. Our policies need to catch up Worth seeing www.ctvnews.ca/calgary/arti...
ctvnews.ca
‘Outdated’ health policies surrounding Covid still pose a danger today, says U of C researcher
University of Calgary professor Mark Ungrin has dedicated years of research highlighting what he believes is of significant concern to all Canadians’ health.
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Yaneer Bar-Yam @yaneerbaryam.bsky.social · 21/09/2026
Steven Spielberg, interviewed outside at the opening of the Lucas Museum of Narrative Art on September 19, 2026, wearing a respirator. A reminder that some people are still taking airborne infection seriously. Respiratory protection can be an ordinary part of everyday life.
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Yaneer Bar-Yam @yaneerbaryam.bsky.social · 21/08/2026
School in Baker, LA closes due to rising COVID cases. Responds by disinfecting surfaces. COVID is airborne. Clean air is needed. Too few schools know this yet. We need more voices explaining it, teaching it in schools. #CleanAir www.yahoo.com/news/us/arti...
yahoo.com
Classes at Park Ridge Achievement Academy canceled Friday as COVID cases increase
The City of Baker School System released a notice stating that Park Ridge Achievement Academy classes will be canceled Friday due to a rise in COVID-19 cases.
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Yaneer Bar-Yam @yaneerbaryam.bsky.social · 15/05/2026
WHN constructed an animation of the voyage of the M/V Hondius during the Andes hantavirus outbreak, including the ship’s route, known cases, evacuations, and passenger dispersal as reported publicly by WHO, the ship owner, governments, and media sources. Animation: whn.global/m-v-hondius-...
whn.global
M/V Hondius — Atlantic Odyssey: Tracking the First Andes Hantavirus Outbreak at Sea - WHN
This animation traces the 45-day voyage of the expedition cruise ship M/V Hondius from Ushuaia, Argentina to the English Channel (1 Apr – 15 May 2026), during which an outbreak of Andes hantavirus was...
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Yaneer Bar-Yam @yaneerbaryam.bsky.social · 10/05/2026
It is encouraging to see WHO update its Andes hantavirus guidance on May 8 to recommend respirators rather than medical masks for symptomatic individuals. Recognition of airborne transmission risk and respiratory protection are important for effective outbreak response. www.who.int/emergencies/...
who.int
Hantavirus cluster linked to cruise ship travel, Multi-country
On 2 May 2026, a cluster of passengers with severe respiratory illness aboard a cruise ship was reported to the World Health Organization (WHO). At that time, according to the ship operator, 147 passe...
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Yaneer Bar-Yam @yaneerbaryam.bsky.social · 08/05/2026
The Andes virus outbreak associated with the MV Hondius should be treated with urgency now, before transmission chains become established internationally. 1/
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Yaneer Bar-Yam @yaneerbaryam.bsky.social · 06/05/2026
The MV Hondius hantavirus outbreak isn't the first Andes virus outbreak. Attached article in 2020 documents person-to-person transmission in Argentina outbreak: 34 cases, 11 deaths, four generations of human-to-human transmission. www.nejm.org/doi/full/10....
nejm.org
“Super-Spreaders” and Person-to-Person Transmission of Andes Virus in Argentina | NEJM
From November 2018 through February 2019, person-to-person transmission of Andes virus (ANDV) hantavirus pulmonary syndrome occurred in Chubut Province, Argentina, and resulted in 34 confirmed infe...
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Trish Greenhalgh @trishgreenhalgh.bsky.social · 30/04/2026
More rapid responses to our recent paper in @bmj.com about the problems of non-inferiority trials in mask efficacy research. www.bmj.com/content/393/... Thanks @adamfinkel.bsky.social
bmj.com
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Yaneer Bar-Yam @yaneerbaryam.bsky.social · 24/04/2026
"We want medications for our lungs, our hearts, our stomachs, our immune systems, our brains—damaged by the Covid virus." "Real care, not cognitive behavioral therapy. Not meditation." France, this week. Long Covid patients refused to be ignored. Statement ⬇️ Translation: @GreeneWendy
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Yaneer Bar-Yam @yaneerbaryam.bsky.social · 08/03/2026
New study: New evidence for immune deficiency after COVID Infection even 20 months post-infection. Men affected more than women. "Our findings redefine SARS-CoV-2 infection as a condition of long-lasting immune compromise." sciencedirect.com/science/arti...
sciencedirect.com
Persistent attenuation of lymphocyte subsets after mass SARS-CoV-2 infection
Growing evidence suggests that lymphocyte subsets are declined in COVID-19 patients, but it is unclear if these alterations persist after widespread e…
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Yaneer Bar-Yam @yaneerbaryam.bsky.social · 22/02/2026
m.independent.ie/opinion/comm... "400,000 studies show that Covid harms everyone, and a study in Lancet oncology indicates...a greater risk of death in cancer patients. Why is this avalanche of scientific studies not informing hospital Infection Prevention and Control (IPC) guidance?"
m.independent.ie
Tess Finch Lees: From the Winter Olympics to Nasa, wearing masks is back – except when it comes to our hospitals
Masks are back: at the Olympics, at Nasa and with A-listers.
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Yaneer Bar-Yam @yaneerbaryam.bsky.social · 15/01/2026
Experts Call For N95s Over Surgical Masks As Flu, Covid Viruses Spread, @DrJudyStone writes in @forbes "WHN sent a letter to the WHO urging them to declare respirators as the default protection for healthcare workers, rather than surgical masks." www.forbes.com/sites/judyst...
forbes.com
Experts Call For N95s Over Surgical Masks As Flu, Covid Viruses Spread
World Health Network experts urge WHO to make N95, KN95, or FFP2 respirators the standard for protection for healthcare workers, not inferior surgical masks.
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Cat Fraser @catsocialintel.bsky.social · 09/01/2026
Great start to Jan! Thank you @georgemonbiot.bsky.social @theguardian.com for supporting the @thewhn.bsky.social letter campaign to @who.int
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Yaneer Bar-Yam @yaneerbaryam.bsky.social · 09/01/2026
The British Medical Journal (BMJ) covers our letter calling for respirator use in healthcare to protect patients and staff (reporting by Elisabeth Mahase). I’ve shared The Guardian coverage in a separate post. www.bmj.com/content/392/...
bmj.com
WHO urged to make respirator masks the standard for workers in “all healthcare settings”
Doctors, scientists, and public health experts have urged the World Health Organization (WHO) to recommend that healthcare workers wear respirators “in every encounter in all healthcare settings.” Th...
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Esther @elhopkins.bsky.social · 09/01/2026
The current guidance is incorrect on COVID just look at all the experts who signed this.
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Yaneer Bar-Yam @yaneerbaryam.bsky.social · 09/01/2026
Our letter to WHO, signed by over 2,300, calls for respirator use in healthcare to protect patients and staff. Covered by Kat Lay in The Guardian: www.theguardian.com/global-devel...
theguardian.com
Face masks ‘inadequate’ and should be swapped for respirators, WHO is advised
Experts are urging guideline changes on what health professionals should wear to protect against flu-like illnesses including Covid
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Yaneer Bar-Yam @yaneerbaryam.bsky.social · 01/01/2026
Rochester Medical Center and Rochester Regional Health now require masks for staff, patients, and visitors www.fingerlakes1.com/2026/01/01/h...
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Yaneer Bar-Yam @yaneerbaryam.bsky.social · 01/01/2026
Atlanta: DeKalb County issues alert as flu-related 911 calls spike 60% Emory Healthcare is requiring all clinical staff members to wear masks in both inpatient and outpatient settings. www.ajc.com/wellness/202...
ajc.com
DeKalb County issues alert as flu-related 911 calls spike 60%
The 2025-2026 flu season is likely going to get worse, officials say.
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Yaneer Bar-Yam @yaneerbaryam.bsky.social · 31/12/2025
Banner Health to enforce mandatory masking starting Jan. 1 due to flu surge www.azfamily.com/2025/12/31/b...
azfamily.com
Banner Health to enforce mandatory masking starting Jan. 1 due to flu surge
A major Arizona hospital system is set to mandate masking at all locations in the Valley and five other states due to rising flu cases.
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Yaneer Bar-Yam @yaneerbaryam.bsky.social · 31/12/2025
Today!
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World Health Network @thewhn.bsky.social · 28/12/2025
3 more days until the WHN NYE Party! As the year winds down, we’ll take time to reflect on what we’ve learned, what we’ve built together, and how we continue advocating for better public health in the year ahead. Sign up: necsi-edu.zoom.us/meeting/regi...
necsi-edu.zoom.us
Welcome! You are invited to join a meeting: WHN NYE 2026. After registering, you will receive a confirmation email about joining the meeting.
Welcome! You are invited to join a meeting: WHN NYE 2026. After registering, you will receive a confirmation email about joining the meeting.
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Yaneer Bar-Yam @yaneerbaryam.bsky.social · 27/12/2025
NY: last week most flu cases ever recorded in a single week (subclade K) Nationally 49,000 hospitalizations and 1,900 deaths from flu so far this season. msn.com/en-us/health...
msn.com
MSN
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Dominic Meagher @dom-ma.bsky.social · 21/12/2025
20% increase in population with a disability over the 5 years since we started repeatedly infecting people with Covid. In case it’s not obvious, that’s terrible for productivity.
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Yaneer Bar-Yam @yaneerbaryam.bsky.social · 21/12/2025
Alert: This is not just another bird flu detection in cattle. It’s the same H5N1 variant linked to severe human cases in North America. Earlier cattle cases involved different strains. This matters. www.yahoo.com/news/article...
yahoo.com
USDA confirms bird flu case in Wisconsin dairy herd as new wildlife spillover
Dec 19 (Reuters) - The United States Department of Agriculture on Friday confirmed that a case of highly pathogenic avian influenza in a Wisconsin dairy herd marked a new spillover event from wildlife
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Yaneer Bar-Yam @yaneerbaryam.bsky.social · 18/12/2025
Brown Health: Masks must be worn by patients, staff and visitors at hospitals. Note: Inform them that respirators should be used. www.wpri.com/health/brown...
wpri.com
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Yaneer Bar-Yam @yaneerbaryam.bsky.social · 10/12/2025
Update France: Masks mandatory in several hospitals: Le Mans and Amiens tighten their rules entrevue.fr/en/sante/mas...
entrevue.fr
Masks are mandatory in several hospitals: Le Mans and Amiens…
Since Tuesday, December 9, 2025, the Le Mans hospital has once again mandated mask-wearing in all its healthcare areas. Consultations,…
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Yaneer Bar-Yam @yaneerbaryam.bsky.social · 04/12/2025
RWJBarnabas hospitals in NJ Dec 1 Masks required for • staff for patient care • inpatients outside their rooms • visitors, volunteers & vendors near patients Patients may request clinicians to mask—and staff must comply Ask your hospital to protect patients, staff & visitors.
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Yaneer Bar-Yam @yaneerbaryam.bsky.social · 02/12/2025
Breaking: Spain brings masks back. Mandatory in hospitals, primary care, and long-term care—for patients, visitors, and staff. Strong recommendation everywhere else. Public health moving where evidence points. Note: Really worth upgrading to respirators. euroweeklynews.com/2025/11/28/s...
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Yaneer Bar-Yam @yaneerbaryam.bsky.social · 20/11/2025
Let’s not get confused about science. Many studies have looked for a link between vaccines and autism — none has found one. “We haven’t ruled it out” is a logic loop; by that logic we also haven’t ruled out peanut butter, bedtime stories, or blue socks. 1/
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Yaneer Bar-Yam @yaneerbaryam.bsky.social · 14/11/2025
WA state confirms first bird flu case in a resident this year “Please limit your contacts as best as possible with wild birds (and) domestic animals, and certainly contact your health care providers if you’re ill or have these contacts.” www.seattletimes.com/seattle-news...
seattletimes.com
WA confirms first bird flu case in a resident this year
A Grays Harbor County resident has tested preliminarily positive for bird flu in the first human case recorded in WA this year.
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Yaneer Bar-Yam @yaneerbaryam.bsky.social · 12/11/2025
🧬 Gratitude meets Science! The new Kids’ Zone magazine celebrates vaccines, curiosity, and creative kids worldwide — from pizza faces to midnight science conferences. 👉 Read Issue 16 “The Thankful for Science Edition” at whn.global/kidszone/
whn.global
Kids' Zone - WHN
Welcome to the World Health Network Kids’ Zone Magazine! Although COVID-19 is a serious topic, living a COVID-Conscious lifestyle can be fun and rewarding. In this magazine we highlight the many ways ...
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Yaneer Bar-Yam @yaneerbaryam.bsky.social · 08/11/2025
Japan flu update: 2,307 kindergartens, nursery schools, and elementary, junior high and senior high schools were closed partially or fully due to the flu. www.nippon.com/en/news/yjj2...
nippon.com
Flu Cases Exceed Alert Level in Japan
Tokyo, Nov. 7 (Jiji Press)--The average number of new influenza cases per regularly monitored medical institut…
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Yaneer Bar-Yam @yaneerbaryam.bsky.social · 07/11/2025
Tom Hanks on mask wearing: “I’ve had COVID enough in my life” www.thecanary.co/global/world...
thecanary.co
Tom Hanks on mask wearing: "I’ve had COVID enough in my life”
Tom Hanks has joined a growing movement of COVID-conscious artists who are openly speaking up about the threats of the disease
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Yaneer Bar-Yam @yaneerbaryam.bsky.social · 06/11/2025
New Data: COVID-19 infection causes many times more serious health problems in kids than vaccination does. Vaccines reduce risk — not just of infection, but of long-term complications. Explainer in The Globe and Mail: www.theglobeandmail.com/life/wellnes...
theglobeandmail.com
Kids at higher risk of rare heart conditions after COVID-19 infection compared with after vaccine
New study looked at health records from nearly 14 million young people who had coronavirus
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Long COVID Labs @longcovidlabs.bsky.social · 04/11/2025
🚨This is so important: "After years of denial the international consensus is now shifting,” according to physicist @yaneerbaryam.bsky.social COVID-19 is: 🛑creating a 12.9% increase in workplace absences compared to pre-pandemic 🛑causing a 2% increase in excess deaths vs. pre-pandemic 1/
Screenshot of the first 2 paragraphs of the article.  Text says:

If you think the COVID pandemic is done and ever-evolving variants pose no significant threat, consider these two realities.

The first is a recent U.S. study published in the Journal of the American Medical Association. It tracked 150 million workers and their absences in the workplace in the United States since the end of the so-called public health emergency in 2023.

Its central conclusion: “Health-related absences from work continued to track COVID-19 circulation and were 12.9 per cent higher in the post-pandemic period compared with before the pandemic (140,000 monthly absences).” Absences were highest in occupations with the greatest exposure to the public.
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Yaneer Bar-Yam @yaneerbaryam.bsky.social · 01/11/2025
I appreciate Andrew Nikiforuk at @TheTyee for highlighting the continuing science of COVID and the importance of prevention. The virus keeps reshaping health and society — we can still choose to act wisely. thetyee.ca/Analysis/202...
thetyee.ca
This Physicist Says We Don’t Take COVID Seriously Enough | The Tyee
We downplay the virus at our peril, warns Yaneer Bar-Yam. And children are more at risk than we thought.
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Yaneer Bar-Yam @yaneerbaryam.bsky.social · 30/10/2025
More than 700 experts and supporters have signed this call urging WHO to make N95/FFP2-3 respirators the global healthcare standard. Surgical masks are not enough. Anyone can sign: tinyurl.com/RespiratorsN... #RespiratorsNotSurgicals
tinyurl.com
A Call for the Universal Use of Respirators in Healthcare - Add Your Name
In an effort to advance global public health through turbulent times, a group of experts from around the globe in medicine, public health, law, industrial hygiene, and other disciplines, met at the Un...
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Long Covid Advocacy @longcovidadvoc.com · 29/10/2025
We've signed. It's long past time when N95s should be the norm not the exception. Patients & staff deserve to be protected & safe.
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Nigel Goldenfeld @nigelgoldenfeld.bsky.social · 28/10/2025
🧪 Hard to believe that this is still something we have to argue for in 2025. The science is settled.
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Yaneer Bar-Yam @yaneerbaryam.bsky.social · 28/10/2025
Doctors & scientists urge WHO: N95s—not surgical masks—must be the standard in healthcare. Add your name before Oct 31 👇 tinyurl.com/RespiratorsN... #RespiratorsNotSurgicals #ProtectHCWs
tinyurl.com
A Call for the Universal Use of Respirators in Healthcare - Add Your Name
In an effort to advance global public health through turbulent times, a group of experts from around the globe in medicine, public health, law, industrial hygiene, and other disciplines, met at the Un...
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Yaneer Bar-Yam @yaneerbaryam.bsky.social · 24/10/2025
70 per cent of Sydney central business district workers work from home at least some of the time...a significant and enduring shift in commuting patterns and public transport demand
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World Health Network @thewhn.bsky.social · 21/10/2025
#MaskUp #Respirator #CleanAir #LongCOVID #BrainHealth #TheLion
Promotional graphic from whn.global showing a majestic lion in grayscale wearing a white N95 respirator mask. The background is dark, emphasizing the lion’s mane and the mask.

Text reads:
“The lion does not concern himself with cognitive decline. He wears a respirator.”

The whn.global logo appears in the upper left corner.
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Yaneer Bar-Yam @yaneerbaryam.bsky.social · 16/10/2025
US state governors launch alliance to bolster coordination on public health reuters.com/world/us/col...
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Yaneer Bar-Yam @yaneerbaryam.bsky.social · 14/10/2025
Our new review compares SARS-CoV-2 & HIV on key similarities & outcomes: –Immune cell (T&other) depletion & dysfunction –Increases in other infections after COVID –Rising incidence of signature diseases of immune deficiency –Limitations of public response ajpmfocus.org/article/S277...
ajpmfocus.org
COVID-19 is “Airborne AIDS”: provocative oversimplification, emerging science, or something in between?
COVID-19 caused by SARS-CoV-2 is often compared to other pandemics for its societal and global health impact, with some commentators drawing parallels to HIV/AIDS due to the immune dysfunction caused ...
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Yaneer Bar-Yam @yaneerbaryam.bsky.social · 12/10/2025
+West Virginia Pharmacists in West Virginia can now give COVID-19 vaccines without prescriptions -- and state recommendations based on those of medical societies for everyone over 6 months. www.herald-dispatch.com/_zapp/pharma...
herald-dispatch.com
Pharmacists in West Virginia can now give COVID-19 vaccines without prescriptions
West Virginia pharmacists can now give COVID-19 shots without prescriptions, according to guidance issued Oct. 6 by the West Virginia Board of Pharmacy.
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Yaneer Bar-Yam @yaneerbaryam.bsky.social · 10/10/2025
Japan gripped by massive flu outbreak: Hospitals struggle, schools shut www.indiatoday.in/world/story/...
indiatoday.in
Japan gripped by massive flu outbreak: Hospitals struggle, schools shut
With flu cases expected to peak sooner than usual, authorities are urging people, especially the elderly, young children, and those with pre-existing conditions, to get vaccinated immediately.
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Yaneer Bar-Yam @yaneerbaryam.bsky.social · 09/10/2025
"Sonoma County...issued an order today requiring health care personnel and others to wear masks inside patient care areas of specified health care facilities. The health order...will take effect Nov. 1" sonomacounty.gov/sonoma-count...
sonomacounty.gov
Sonoma County issues mask order for health facilities and encourages residents to get vaccinated for flu and COVID
Given the greater risk of COVID, flu and other respiratory virus-related illnesses over the fall and winter months, Sonoma County Interim Health Officer Dr. Karen Smith issued an order today requiring...
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Yaneer Bar-Yam @yaneerbaryam.bsky.social · 09/10/2025
"A sore knee brought you in, but you start to wonder if you might get sick as you take your seat next to an unmasked child with a runny nose. And you’re right: Crowded spaces like these are the perfect setting for respiratory infections to spread." www.thestar.com/opinion/cont...
thestar.com
Iris Gorfinkel: How politics, not science, is putting vulnerable patients and health care workers at risk
As a family doctor, I have seen first-hand the difference masking makes. Since my clinic adopted consistent masking, staff absences from colds, flus, and COVID‑19 have plummeted. Scaled across the
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