Thread by @ahmedaftab68

1-Virus spreads through air especially indoor in areas of low ventialtion
Have a look at this thread if you want to know how you can check if ventialtion in an area is adequate.
Its really easy!

@CNagpaul @helenamckeown @KailashChandOBE @sarahedderwick @anilkjain61 @doctorshaib

2-Every time you exhale CO2 is exhaled in air. You can use CO2 levels to see if room is filling with potentially infectious exhalations
CO2 level lets you estimate if enough fresh outside air is getting in

@raj_psyc @docjon55 @petermbenglish @NikkiKF @drpshukla @TheBAMEGP

3-Last year in Taiwan tuberculosis outbreak at Taipei University was found out to be due to underventilated rooms. Rooms had CO2 levels⬇️3000 ppm.When air circulation was improved with CO2 levels⬇️600 ppm outbreak completely stopped

onlinelibrary.wiley.com/doi/full/10.11…

4- So how do you check CO2 levels in a room
It is really easy!
Use a CO2 monitor with NDIR sensors (non-dispersive infrared) CO2 monitor with electrolytic sensor do not work as well
I got Aranet4 sensor 👇 which is recommended for this

See next what I found when I used it..

5-Used it yesterday to check ventialtion in my clinic in laser room (no open windows)
See below the readings⬇️

11.50 am CO2reading 595ppm- I and my registrar enter the room
12.22 pm CO2 reading 1056ppm-
CO2 should remain⬇️600ppm

Clearly ventilation in that room is not adequate

6- If either I or my registrar were infected though still asymptomatic than it is very likely we would have infected the other even if we had maintained social distancing all through that face to face contact

No wonder we are getting so many outbreaks in the hospital

@DocStrain

7- We must pay attention to ventilation

See👇 October Report from HSIB investigation into hospital outbreaks which stresses importance of improving ventialtion

@Jug_Johal @terry_moran1 @surashsurash @David_Farren @DavidGWrigley @AmaraSophia @monikaplaha @Manuel_Cavazza

8-Improving ventialtion may be as simple as opening a window or a door
Please consider checking adequacy of ventilation at your place of work- its so easy to check

Auhthorities must stress this in public messaging

@DPH_MAshton @BWDDPH @AbdulRazaq_PH @Azeem_Majeed

9- See below ventilation is no 1 in public messaging in Japan since March

@felly500 @Smithkjj @FurberA @andrewleedr @ADMBriggs @Dr2NisreenAlwan @ProfKevinFenton
@ADPHUK @devisridhar @AliRacaniere @MrTimLane @PeaPeaspot @AliRacaniere @ghanchif @ParagSinghal09 @drhfidler

10. Found out yesterday that from today there will be Govt public health messaging fronted by @DrAmirKhanGP stressing importance of ventilation

If this is true than atlast 'Penney has dropped'

It still puzzles me why UKGov has been so slow to follow the evidence

@darshnasoni