Theoretical mechanisms - differential glycosylation: 'SARS-CoV-2 produced in individuals with distinct blood groups may differ in their glycosylation patterns, which could impact the binding and susceptibility of SARS-CoV-2 in respiratory epithelium and subsequent transmission'
And just for you @MicrobiomDigest: 'These observations suggest that nasal microbiome communities can influence efficient airborne transmission of respiratory viruses'.
Physical factors driving transmission: 'in superspreader events, long-range transmission is likely to mediate a large proportion of the cases'
'Persistence & concentration of SARS-CoV-2 in virus-laden aerosols is critical for long-range transmission in a superspreader event.'
And obv: 'increased ventilation & reduced capacity in indoor spaces decreases transmission of SARS-CoV-2. Thus, until the host specifics of a superspreader are known, basic NPIs like increased vent'n & air exchange rates may alter the consequences of a superspreading event.'
Email: 20/12/20
Dear [INSERT MP]
I am writing to request your help towards highlighting the need for urgent revisions to the current PHE UK Covid-19 infection prevention & control (IP&C) personal protective equipment (PPE) policy for all “front line” health & social care staff.
To-date, three UK-based reports demonstrate significantly greater risk of SARS-CoV-2 infection and/or death in non-ICU UK patient-facing healthcare workers (HCWs):
The most recent (28th October) is from the BMJ (doi.org/10.1136/bmj.m3…), with data on 158,445 Scottish HCWs...
...(1st Mar – 6th June 2020) indicating that: "patient facing HCWs compared with non-patient facing HCWs, were at higher risk [of SARS-CoV-2 infection] (HR 3.30, 2.13-5.13)...after sub-division of patient facing HCWs into…front door, ICU, non-ICU aerosol generating settings...
“What we have got to do is work out some balance which actually keeps [Covid] at a low level, minimises deaths as best we can but in a way that the population tolerates..,” @CMO_England 1/4/21
137 HCW deaths since 08/20
HCWs tolerate FFP3 but only ICU teams get them: why?
'Dynamic CO-CIN report to SAGE and NERVTAG
Includes patients admitted after 01 August 2020
There are 104666 patients included in CO-CIN. Of these, 21177 patient(s) have died & 18043 required ICU. 62747 have been discharged home.' @trishgreenhalgh
Full quote: As a healthcare worker, my overwhelming impression of the response of WHO teams to the SARS-CoV-2 pandemic is that they failed on the most fundamental aspect: i.e. truthfully describing its transmission characteristics.
/1
Through actively & persistently denying that SARS-CoV-2 transmission occurred via the airborne route, WHO teams have *amplified* the pandemic, caused huge waste in surface cleaning measures & allowed nation states' IPAC policies for HCWs & their population to remain...
/2
'Our estimates are that in the post-intervention [FFP3] period there was a 37% reduction in staff off sick with Covid-19 even accounting for immunity. The effect of this multiplied across the entire NHS in avoiding staff sickness, long Covid, & even death would be enormous'
'In our study it is reassuring that the overwhelming majority of staff members (79%), following eight weeks of enhanced respiratory protection with FFP3, stated their preference to continue their use'
Another notable finding: 10/11 HCWs who knew the reason for changing to FFP3 (i.e. increased @CUH_NHS staff sickness) wanted to continue using FFP3 after the study period.
I'm guessing you didn't even need to show them an IPAC 'disaster graphic' like this @mjb302? @microlabdoc
'The [WHO] process of developing evidence-based guideline documents for clinicians, public health experts & policymakers follows rigorous, standardized procedures, making sure that their compilation is transparent & based on evidence, & that any potential COIs are made explicit'
'The organization aims at making guidelines, when applicable, close to “real-time”, which it believes would be possible by using a “living guidelines” approach based on living systematic reviews and living recommendations' @microlabdoc
I am sorry I can only copy two lead authors directly, but I would like to thank all authors for acting on their high sense of responsibility towards improving public health.
I am also sorry I could not reply within the 7-day window you provided for 'stakeholder feedback'.
I hope you don't mind a Q?
Given:
- Epidemiological studies support airborne transmission
- Presence of virus RNA in the air, air vents/exhausts/ducts/filters
- Presence of virus RNA in exhaled breath
- Airborne viability up to 16 hours
- Presence of live virus in the air
...