David Osborn
@safedavid3.bsky.social
Health and Safety Consultant
Executive Team Member Covid-19 Airborne Transmission Alliance (CATA)
Core Participant in UK Covid-19 Public Inquiry
Views are my own
Executive Team Member Covid-19 Airborne Transmission Alliance (CATA)
Core Participant in UK Covid-19 Public Inquiry
Views are my own
Pinned
David Osborn
@safedavid3.bsky.social
· Jul 28
🚨🔔 🚨🔔 🚨🔔 🚨🔔 🚨🔔
HSE are holding their AGM on 29th July.
I have tabled 3 questions in advance.
These may be of interest to healthcare workers - those still in service and those who were injured by Covid and can no longer work (or are limited as to what they can do).
HSE are holding their AGM on 29th July.
I have tabled 3 questions in advance.
These may be of interest to healthcare workers - those still in service and those who were injured by Covid and can no longer work (or are limited as to what they can do).
📢 Children have been bullied by adults and children, denied remote education & families threatened with fines – just for trying to stay safe in a pandemic.
This is the reality for Clinically Vulnerable families.
Read CVF's new blog ahead of the #CovidInquiry children’s module👇 which starts 29 Sep
This is the reality for Clinically Vulnerable families.
Read CVF's new blog ahead of the #CovidInquiry children’s module👇 which starts 29 Sep
September 21, 2025 at 7:22 PM
📢 Children have been bullied by adults and children, denied remote education & families threatened with fines – just for trying to stay safe in a pandemic.
This is the reality for Clinically Vulnerable families.
Read CVF's new blog ahead of the #CovidInquiry children’s module👇 which starts 29 Sep
This is the reality for Clinically Vulnerable families.
Read CVF's new blog ahead of the #CovidInquiry children’s module👇 which starts 29 Sep
Reposted by David Osborn
[27 Jun 2025] @DrTedros at WHO media briefing:
“We cannot talk about COVID-19 in the past tense. Although the crisis has passed, the virus remains.
It continues to evolve, it continues to kill, and millions of people continue to live with post COVID-19 condition or long COVID.”
“We cannot talk about COVID-19 in the past tense. Although the crisis has passed, the virus remains.
It continues to evolve, it continues to kill, and millions of people continue to live with post COVID-19 condition or long COVID.”
June 29, 2025 at 1:08 PM
[27 Jun 2025] @DrTedros at WHO media briefing:
“We cannot talk about COVID-19 in the past tense. Although the crisis has passed, the virus remains.
It continues to evolve, it continues to kill, and millions of people continue to live with post COVID-19 condition or long COVID.”
“We cannot talk about COVID-19 in the past tense. Although the crisis has passed, the virus remains.
It continues to evolve, it continues to kill, and millions of people continue to live with post COVID-19 condition or long COVID.”
Exercise Pegasus - The UK Prepares for Pandemic simulation.
I wonder whether key stakeholders will be invited to join as participants or observers?
By "key stakeholders” I mean those who will die or be seriously harmed when Gov UK gets it wrong (again!)
I wonder whether key stakeholders will be invited to join as participants or observers?
By "key stakeholders” I mean those who will die or be seriously harmed when Gov UK gets it wrong (again!)
September 14, 2025 at 2:00 AM
Exercise Pegasus - The UK Prepares for Pandemic simulation.
I wonder whether key stakeholders will be invited to join as participants or observers?
By "key stakeholders” I mean those who will die or be seriously harmed when Gov UK gets it wrong (again!)
I wonder whether key stakeholders will be invited to join as participants or observers?
By "key stakeholders” I mean those who will die or be seriously harmed when Gov UK gets it wrong (again!)
🚨🚨🚨 STOP PRESS 🚨🚨🚨
Paper published by eminent UK scientists compare the effectiveness of PPE and other risk controls for protecting healthcare workers against Covid infections.
academic.oup.com/annweh/artic...
Powered hoods most effective FFP3s almost as effective.
FRSMs very poor.
Paper published by eminent UK scientists compare the effectiveness of PPE and other risk controls for protecting healthcare workers against Covid infections.
academic.oup.com/annweh/artic...
Powered hoods most effective FFP3s almost as effective.
FRSMs very poor.
The relative effectiveness of personal protective equipment and environmental controls in protecting healthcare workers from Covid-19
AbstractObjectives. Our aim was to explore the probable effectiveness of personal protective equipment (PPE) and environmental controls in protecting healt
academic.oup.com
September 14, 2025 at 12:40 AM
🚨🚨🚨 STOP PRESS 🚨🚨🚨
Paper published by eminent UK scientists compare the effectiveness of PPE and other risk controls for protecting healthcare workers against Covid infections.
academic.oup.com/annweh/artic...
Powered hoods most effective FFP3s almost as effective.
FRSMs very poor.
Paper published by eminent UK scientists compare the effectiveness of PPE and other risk controls for protecting healthcare workers against Covid infections.
academic.oup.com/annweh/artic...
Powered hoods most effective FFP3s almost as effective.
FRSMs very poor.
🚨😷🚨😷🚨😷🚨😷
BREAKING NEWS
At last, in the UK, we now have official guidance on the use of respirators (FFP3) vs Fluid Resistant Surgical Masks (FRSM) which has been prepared SPECIFICALLY FOR THE HEALTHCARE SECTOR.
🚨😷🚨😷🚨😷🚨😷
BREAKING NEWS
At last, in the UK, we now have official guidance on the use of respirators (FFP3) vs Fluid Resistant Surgical Masks (FRSM) which has been prepared SPECIFICALLY FOR THE HEALTHCARE SECTOR.
🚨😷🚨😷🚨😷🚨😷
August 22, 2025 at 11:51 PM
🚨😷🚨😷🚨😷🚨😷
BREAKING NEWS
At last, in the UK, we now have official guidance on the use of respirators (FFP3) vs Fluid Resistant Surgical Masks (FRSM) which has been prepared SPECIFICALLY FOR THE HEALTHCARE SECTOR.
🚨😷🚨😷🚨😷🚨😷
BREAKING NEWS
At last, in the UK, we now have official guidance on the use of respirators (FFP3) vs Fluid Resistant Surgical Masks (FRSM) which has been prepared SPECIFICALLY FOR THE HEALTHCARE SECTOR.
🚨😷🚨😷🚨😷🚨😷
Shouldn't be necessary to order a Government Agency to just do its job - but hey-ho...
Please sign.
Petition: Direct the UKHSA to monitor COVID infections that occur in particular settings
petition.parliament.uk/petitions/73...
Please sign.
Petition: Direct the UKHSA to monitor COVID infections that occur in particular settings
petition.parliament.uk/petitions/73...
Petition: Direct the UKHSA to monitor COVID infections that occur in particular settings
Ensure that the UK Health Security Agency (UKHSA) monitors, and reports on, the numbers of COVID infections that occur in healthcare settings through its routine surveillance programmes, and advises o...
petition.parliament.uk
August 20, 2025 at 8:28 PM
Shouldn't be necessary to order a Government Agency to just do its job - but hey-ho...
Please sign.
Petition: Direct the UKHSA to monitor COVID infections that occur in particular settings
petition.parliament.uk/petitions/73...
Please sign.
Petition: Direct the UKHSA to monitor COVID infections that occur in particular settings
petition.parliament.uk/petitions/73...
Reposted by David Osborn
I'm overwhelmed by the public support for a CSA National Standard in 🇨🇦 for precautionary universal N95 use in healthcare
From all over the world
Like this comment from @safedavid3.bsky.social
From all over the world
Like this comment from @safedavid3.bsky.social
August 17, 2025 at 3:55 PM
I'm overwhelmed by the public support for a CSA National Standard in 🇨🇦 for precautionary universal N95 use in healthcare
From all over the world
Like this comment from @safedavid3.bsky.social
From all over the world
Like this comment from @safedavid3.bsky.social
🚨🔔 🚨🔔 🚨🔔 🚨🔔 🚨🔔
HSE are holding their AGM on 29th July.
I have tabled 3 questions in advance.
These may be of interest to healthcare workers - those still in service and those who were injured by Covid and can no longer work (or are limited as to what they can do).
HSE are holding their AGM on 29th July.
I have tabled 3 questions in advance.
These may be of interest to healthcare workers - those still in service and those who were injured by Covid and can no longer work (or are limited as to what they can do).
July 28, 2025 at 1:35 AM
🚨🔔 🚨🔔 🚨🔔 🚨🔔 🚨🔔
HSE are holding their AGM on 29th July.
I have tabled 3 questions in advance.
These may be of interest to healthcare workers - those still in service and those who were injured by Covid and can no longer work (or are limited as to what they can do).
HSE are holding their AGM on 29th July.
I have tabled 3 questions in advance.
These may be of interest to healthcare workers - those still in service and those who were injured by Covid and can no longer work (or are limited as to what they can do).
Dr Phil Hammond reveals in Private Eye that CATA (the Covid Airborne Transmission Alliance) is threatening to take the UK Government to Court for a judicial review.
Pre-action protocols require the parties to attempt to resolve their issues out of Court.
Pre-action protocols require the parties to attempt to resolve their issues out of Court.
July 10, 2025 at 8:58 PM
Dr Phil Hammond reveals in Private Eye that CATA (the Covid Airborne Transmission Alliance) is threatening to take the UK Government to Court for a judicial review.
Pre-action protocols require the parties to attempt to resolve their issues out of Court.
Pre-action protocols require the parties to attempt to resolve their issues out of Court.
🚨 🚨 🚨 🚨 🚨 🚨
Absolutely essential viewing for any doctor, nurse, midwife, porter or other healthcare worker wishing to survive the next pandemic of an airborne pathogen.
Watch this interview at all costs...
tinyurl.com/yc74vj66
🚨 🚨 🚨 🚨 🚨 🚨
#1 of 8
Absolutely essential viewing for any doctor, nurse, midwife, porter or other healthcare worker wishing to survive the next pandemic of an airborne pathogen.
Watch this interview at all costs...
tinyurl.com/yc74vj66
🚨 🚨 🚨 🚨 🚨 🚨
#1 of 8
June 13, 2025 at 11:24 AM
🚨 🚨 🚨 🚨 🚨 🚨
Absolutely essential viewing for any doctor, nurse, midwife, porter or other healthcare worker wishing to survive the next pandemic of an airborne pathogen.
Watch this interview at all costs...
tinyurl.com/yc74vj66
🚨 🚨 🚨 🚨 🚨 🚨
#1 of 8
Absolutely essential viewing for any doctor, nurse, midwife, porter or other healthcare worker wishing to survive the next pandemic of an airborne pathogen.
Watch this interview at all costs...
tinyurl.com/yc74vj66
🚨 🚨 🚨 🚨 🚨 🚨
#1 of 8
Please support this petition which directs UKHSA to monitor COVID infections which occur in particular settings.
petition.parliament.uk/petitions/70...
An open and transparent insight is needed into HealthCare Associated Infections
Please re-post widely. Only a few days to go
petition.parliament.uk/petitions/70...
An open and transparent insight is needed into HealthCare Associated Infections
Please re-post widely. Only a few days to go
Petition: Direct the UKHSA to monitor COVID infections that occur in particular settings.
Ensure that the UK Health Security Agency (UKHSA) monitors, and reports on, the numbers of COVID infections that occur in healthcare settings through its routine surveillance programmes, and advises o...
petition.parliament.uk
May 24, 2025 at 2:22 PM
Please support this petition which directs UKHSA to monitor COVID infections which occur in particular settings.
petition.parliament.uk/petitions/70...
An open and transparent insight is needed into HealthCare Associated Infections
Please re-post widely. Only a few days to go
petition.parliament.uk/petitions/70...
An open and transparent insight is needed into HealthCare Associated Infections
Please re-post widely. Only a few days to go
Reposted by David Osborn
Covid-19 is airborne.
Poor indoor air quality in healthcare settings increases infection risks for staff, patients & visitors.
We’re calling for urgent action. Read our second position statement:
🔗 shh-uk.org/shh-uk-posit...
#SafeAir4All #ProtectHCWs #LongCovid
Poor indoor air quality in healthcare settings increases infection risks for staff, patients & visitors.
We’re calling for urgent action. Read our second position statement:
🔗 shh-uk.org/shh-uk-posit...
#SafeAir4All #ProtectHCWs #LongCovid
May 21, 2025 at 12:26 PM
Covid-19 is airborne.
Poor indoor air quality in healthcare settings increases infection risks for staff, patients & visitors.
We’re calling for urgent action. Read our second position statement:
🔗 shh-uk.org/shh-uk-posit...
#SafeAir4All #ProtectHCWs #LongCovid
Poor indoor air quality in healthcare settings increases infection risks for staff, patients & visitors.
We’re calling for urgent action. Read our second position statement:
🔗 shh-uk.org/shh-uk-posit...
#SafeAir4All #ProtectHCWs #LongCovid
CATA (Covid Airborne Transmission Alliance) has given accounts of its involvement with the UK COVID-19 Inquiry to the SHBN
The presentations may be found here:
tinyurl.com/yc33td7z
Includes a summary of CATA's representations to Ministers and Chief Nursing Officers (who continue to remain silent).
The presentations may be found here:
tinyurl.com/yc33td7z
Includes a summary of CATA's representations to Ministers and Chief Nursing Officers (who continue to remain silent).
Presentation from David Osborn to the Safer Healthcare Biosafety Network (28 March 2025)
David Osborn, health and safety consultant and member of the Covid Airborne Transmission Alliance (CATA), has given an account of CATA’s journey through the Covid-19 Public Inquiry to the Safer Health...
tinyurl.com
May 20, 2025 at 11:14 AM
CATA (Covid Airborne Transmission Alliance) has given accounts of its involvement with the UK COVID-19 Inquiry to the SHBN
The presentations may be found here:
tinyurl.com/yc33td7z
Includes a summary of CATA's representations to Ministers and Chief Nursing Officers (who continue to remain silent).
The presentations may be found here:
tinyurl.com/yc33td7z
Includes a summary of CATA's representations to Ministers and Chief Nursing Officers (who continue to remain silent).
Reposted by David Osborn
NB @ashleydaltonmp.bsky.social
Come clean! Improve and save lives, get people's health and wellbeing back on track for a more productive workforce (and better economic growth)!
Come clean! Improve and save lives, get people's health and wellbeing back on track for a more productive workforce (and better economic growth)!
May 4, 2025 at 12:17 PM
NB @ashleydaltonmp.bsky.social
Come clean! Improve and save lives, get people's health and wellbeing back on track for a more productive workforce (and better economic growth)!
Come clean! Improve and save lives, get people's health and wellbeing back on track for a more productive workforce (and better economic growth)!
Reposted by David Osborn
A second mention of our beloved wall in Parliament today shows an understanding that the wall is an ongoing thing, a living memorial to our beloved dead. ❤️
January 16, 2025 at 8:53 PM
A second mention of our beloved wall in Parliament today shows an understanding that the wall is an ongoing thing, a living memorial to our beloved dead. ❤️
🚨🚨🚨🚨🚨🚨🚨🚨
CATA (The Covid Airborne Transmission Alliance) has, once again, written to Health Minister, Ashley Dalton, on the topic airborne transmission of Covid-19 and other diseases and her stated refusal to change IPC guidance.
Our letter can be found here: tinyurl.com/ykvftvdu
/1 of 11
CATA (The Covid Airborne Transmission Alliance) has, once again, written to Health Minister, Ashley Dalton, on the topic airborne transmission of Covid-19 and other diseases and her stated refusal to change IPC guidance.
Our letter can be found here: tinyurl.com/ykvftvdu
/1 of 11
tinyurl.com
May 3, 2025 at 10:22 PM
🚨🚨🚨🚨🚨🚨🚨🚨
CATA (The Covid Airborne Transmission Alliance) has, once again, written to Health Minister, Ashley Dalton, on the topic airborne transmission of Covid-19 and other diseases and her stated refusal to change IPC guidance.
Our letter can be found here: tinyurl.com/ykvftvdu
/1 of 11
CATA (The Covid Airborne Transmission Alliance) has, once again, written to Health Minister, Ashley Dalton, on the topic airborne transmission of Covid-19 and other diseases and her stated refusal to change IPC guidance.
Our letter can be found here: tinyurl.com/ykvftvdu
/1 of 11
Just in case anyone is reading any covid-related documents and clicks the link to the now famous HSE RR619 "Evaluating the protection afforded by surgical masks" they will now get a broken link (404).
HSE have shuffled it out of the way.
New link: webarchive.nationalarchives.gov.uk/ukgwa/202412...
HSE have shuffled it out of the way.
New link: webarchive.nationalarchives.gov.uk/ukgwa/202412...
web.archive.org
April 22, 2025 at 3:20 PM
Just in case anyone is reading any covid-related documents and clicks the link to the now famous HSE RR619 "Evaluating the protection afforded by surgical masks" they will now get a broken link (404).
HSE have shuffled it out of the way.
New link: webarchive.nationalarchives.gov.uk/ukgwa/202412...
HSE have shuffled it out of the way.
New link: webarchive.nationalarchives.gov.uk/ukgwa/202412...
How many others with Long-Covid have been unfairly discriminated against due to lack of "reasonable adjustments" by unfeeling, uncaring employers in healthcare, education and so many other sectors of industry?
This could be a helpful case.
www.ioshmagazine.com/2025/04/11/b...
This could be a helpful case.
www.ioshmagazine.com/2025/04/11/b...
Teacher fired over Long Covid-related absence awarded more than £50k
The employment tribunal found that Ms J White was unfairly dismissed and discriminated against but did not uphold her claim that the school failed to make reasonable adjustments.
www.ioshmagazine.com
April 15, 2025 at 12:08 PM
How many others with Long-Covid have been unfairly discriminated against due to lack of "reasonable adjustments" by unfeeling, uncaring employers in healthcare, education and so many other sectors of industry?
This could be a helpful case.
www.ioshmagazine.com/2025/04/11/b...
This could be a helpful case.
www.ioshmagazine.com/2025/04/11/b...
Reposted by David Osborn
www.youtube.com/watch?v=2cpR...
Covid was known to be airborne from day 1. The guidance is still incorrect.
Covid was known to be airborne from day 1. The guidance is still incorrect.
UK Covid 19 Inquiry - Module 3 Hearing - 12 September 2024 AM
YouTube video by UK Covid-19 Inquiry
www.youtube.com
April 6, 2025 at 12:45 PM
www.youtube.com/watch?v=2cpR...
Covid was known to be airborne from day 1. The guidance is still incorrect.
Covid was known to be airborne from day 1. The guidance is still incorrect.
Reposted by David Osborn
I spend my days in the microscope quantifying things like the images below. These photos show neurons 🔵 and microglia 🟣 (brain immune cells). Each #SARSCoV2 infected cell entering the brain generates this response in our Covid monkey model. #FluorescenceSaturday
#NeuroCovid
#NeuroCovid
April 5, 2025 at 5:02 PM
I spend my days in the microscope quantifying things like the images below. These photos show neurons 🔵 and microglia 🟣 (brain immune cells). Each #SARSCoV2 infected cell entering the brain generates this response in our Covid monkey model. #FluorescenceSaturday
#NeuroCovid
#NeuroCovid
Reposted by David Osborn
youtu.be/2cpRZ-ZoOVA?...
I can’t empathise enough how important it is for everyone to watch this evidence from the #Covidinquiry. It shows they lied to us about covid being on surfaces. That the current guidance we have now is still wrong and it’s still costing lives.
#covidisairborne 🧵
I can’t empathise enough how important it is for everyone to watch this evidence from the #Covidinquiry. It shows they lied to us about covid being on surfaces. That the current guidance we have now is still wrong and it’s still costing lives.
#covidisairborne 🧵
UK Covid 19 Inquiry - Module 3 Hearing - 12 September 2024 AM
YouTube video by UK Covid-19 Inquiry
youtu.be
April 4, 2025 at 7:17 AM
youtu.be/2cpRZ-ZoOVA?...
I can’t empathise enough how important it is for everyone to watch this evidence from the #Covidinquiry. It shows they lied to us about covid being on surfaces. That the current guidance we have now is still wrong and it’s still costing lives.
#covidisairborne 🧵
I can’t empathise enough how important it is for everyone to watch this evidence from the #Covidinquiry. It shows they lied to us about covid being on surfaces. That the current guidance we have now is still wrong and it’s still costing lives.
#covidisairborne 🧵
Reposted by David Osborn
This BBC piece 24/2/21 shows we knew then but still UK IPC guidance does not reflect airborne transmission with RPE such as FFP3 respirators.
April 2, 2025 at 9:09 AM
This BBC piece 24/2/21 shows we knew then but still UK IPC guidance does not reflect airborne transmission with RPE such as FFP3 respirators.
Reposted by David Osborn
Oops! say NERVTAG the next day – You can’t do that!
Best get the relevant committee (ACDP) to declassify C-19 as HCID PDQ.
ACDP obligingly declassify, following discussion between JVT and ACDP Chair, within the hour of this indiscretion being realised in NERVTAG!
Job done!
9/11
Best get the relevant committee (ACDP) to declassify C-19 as HCID PDQ.
ACDP obligingly declassify, following discussion between JVT and ACDP Chair, within the hour of this indiscretion being realised in NERVTAG!
Job done!
9/11
March 30, 2025 at 12:22 AM
Oops! say NERVTAG the next day – You can’t do that!
Best get the relevant committee (ACDP) to declassify C-19 as HCID PDQ.
ACDP obligingly declassify, following discussion between JVT and ACDP Chair, within the hour of this indiscretion being realised in NERVTAG!
Job done!
9/11
Best get the relevant committee (ACDP) to declassify C-19 as HCID PDQ.
ACDP obligingly declassify, following discussion between JVT and ACDP Chair, within the hour of this indiscretion being realised in NERVTAG!
Job done!
9/11
💥💥💥💥💥
Following her recent letter, CATA has written to the Minister respectfully advising her that, as per her predecessor (Gwynne), she’s been badly advised.
One can only speculate whether by DHSC, UK-HSA or the NHS/IPC “droplet, not airborne” dogmatists.
www.tridenthse.co.uk/2025_03_18_L...
1/11
Following her recent letter, CATA has written to the Minister respectfully advising her that, as per her predecessor (Gwynne), she’s been badly advised.
One can only speculate whether by DHSC, UK-HSA or the NHS/IPC “droplet, not airborne” dogmatists.
www.tridenthse.co.uk/2025_03_18_L...
1/11
March 30, 2025 at 12:10 AM
💥💥💥💥💥
Following her recent letter, CATA has written to the Minister respectfully advising her that, as per her predecessor (Gwynne), she’s been badly advised.
One can only speculate whether by DHSC, UK-HSA or the NHS/IPC “droplet, not airborne” dogmatists.
www.tridenthse.co.uk/2025_03_18_L...
1/11
Following her recent letter, CATA has written to the Minister respectfully advising her that, as per her predecessor (Gwynne), she’s been badly advised.
One can only speculate whether by DHSC, UK-HSA or the NHS/IPC “droplet, not airborne” dogmatists.
www.tridenthse.co.uk/2025_03_18_L...
1/11
Reposted by David Osborn
goodmenproject.com/featured-con...
Read and weep. The failure to recognise airborne transmission of C-19 has impacted every corner of our society and lives. When will @ukhsa.bsky.social wake up?
Read and weep. The failure to recognise airborne transmission of C-19 has impacted every corner of our society and lives. When will @ukhsa.bsky.social wake up?
How Denial of Airborne COVID Transmission Broke the World
As we mark five years since the emergence of SARS-COV-2, the most grievous error of the global pandemic response has become very clear.
goodmenproject.com
March 25, 2025 at 1:24 PM
goodmenproject.com/featured-con...
Read and weep. The failure to recognise airborne transmission of C-19 has impacted every corner of our society and lives. When will @ukhsa.bsky.social wake up?
Read and weep. The failure to recognise airborne transmission of C-19 has impacted every corner of our society and lives. When will @ukhsa.bsky.social wake up?