I became convinced that #COVIDisAirborne back in March 2020 when 102/130 members of a choir got Covid (4 died) after a performance of Bach’s St John Passion. Nothing else could explain this (and similar) events. Why were choir tragedies ignored by so many?
theguardian.com/world/2020/may…
Sneezing and coughing spreads droplets. Speaking and *singing* spreads aerosols. Choir tragedies were the black swans that should have prompted a reassessment of the exclusively fomite-and-droplet mode of transmission.
Because key advisory bodies are still wedded to fomite-and-droplet mental models, we have an over-emphasis on the 2 (or 1.5 or 1) metre rule and an under-emphasis on *shared air*. Thousands continue to die daily because leadership on this key point is lacking.
Yesterday I tweeted “I got it wrong”. It’s OK for scientists to say they’ve reappraised the evidence and changed their minds. Digging oneself further into a hole to defend an obsolete position is not the scientific option.
Follow @hughes_eilir for more on airborne spread

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More from @trishgreenhalgh

9 Jan
It's a year since I first tweeted about an unusual pneumonia spreading in Wuhan, China. I lost my mother to Covid-19 on 27th December. My research on the disease, summarised in this thread, is dedicated to her.

1/
Thanks to the funders of my research: @wellcometrust, @esrc, @nihrresearch, @healthfdn, @scotgov, @The_MRC, and to collaborators formal and informal. Thanks also to my wonderful Twitter followers for your contributions and interest.
2/
The virus that causes Covid-19 (SARS-CoV-2) is airborne. This means it is transmitted by *shared air* at both close range (< 2m) and more distant (>2m). It *is* important to physically distance but there’s nothing magical about 2m.
bmj.com/content/370/bm…
3/
Read 26 tweets
18 Nov 20
Long thread coming: mute if not interested.

The DANMASK19 RCT of masking in Covid-19 prevention has been published. I have serious concerns. I’m deliberately not linking to the paper.
DANMASK19 was an unblinded RCT of surgical mask wearing to test if they protect the *wearer* [did not look at source control], led from a Copenhagen hospital and recruiting ~6000 people via media ads.
As far as I can see, there was
-no involvement of a clinical trials unit
-no data monitoring group
-no reference to CONSORT criteria
-no formal ethics approval
Read 17 tweets
13 Nov 20
Our new paper (important one). RECAP-v0 study.

RECAP = REmote Covid Assessment in Primary Care.

I’ll explain in this thread.

bmjopen.bmj.com/content/10/11/…

1/
Back in March/April I became worried that people with Covid-19 symptoms were being reassured and told to stay at home. Telephone triage staff were using questionable ways of assessing how ill people were and their likelihood of deteriorating.

2/
Hospitals were overstretched. There was pressure on primary care and ambulance services to keep people out of hospital. This led to over-use of instruments like Roth score. cebm.net/covid-19/roth-…

3/
Read 15 tweets
27 Sep 20
Thread on online teaching. (I’ve done lots)
Students in UK & elsewhere are being offered online or ‘blended’ (online + face to face) learning. @Andrew_Adonis tweets that students should be offered a refund. Lecturers say online teaching is harder and more labour-intensive.
1/
20 years ago I set up one of the UK’s first fully online courses – an MSc in International Primary Health Care at UCL. It was UCL’s first ever online course, and was seen as avant garde, experimental and – to quote a critic on a key committee – not “proper” teaching.
2/
Actually, we had good reasons for teaching online: it allowed our part-time students to remain in-country and it also provided a great infrastructure to set up online, global communities of practice which extended beyond the end of the course.
3/
Read 15 tweets
27 Sep 20
Please don’t describe me as a “Top Oxford professor”. Assess my claims on their merits, not on the basis of the reputation of the organisation that hires me. 1/
Ask if my premises are valid. Ask if my conclusions follow from those premises. Ask if I have looked for, and fully accounted for, evidence that appears to refute the claims I’m making. 2/
Count the number of peer-reviewed papers I’ve published on Covid-19. If few or none, question why I’m bypassing the standard scientific quality control process. 3/
Read 5 tweets
17 Sep 20
A story about brothers.

When my elder son was in infant school, he talked a lot about the Gold Book. You got to write your name in it if you’d done really well.

Son really wanted his name in that book. 1/
He picked up litter. He stood up straight in the lunch queue. He looked after the new kid. But somehow, he never made the cut. We worked on his self-esteem. After 3 years, he went up into Juniors and finally forgot about it. 2/
Soon after, little brother started school. A few weeks later I picked them both up and took them to a café. As we waited for our order, little bro mentions that he was sent to the headmistress today. Big bro’s eyes widen. “Were you bad?” 3/
Read 7 tweets

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