Discover and read the best of Twitter Threads about #envirohealthmatters
Most recents (24)
"Indoor Air Management of Airborne Pathogens: Lessons, Practices, and Innovations" eventbrite.com/e/indoor-air-m…
Workshop by @theNASEM focusing on the current state of knowledge ➡️ practical lessons learned. Session 1 starting now.
Live-tweets below
#EHMI #NASEM #EnviroHealthMatters
Workshop by @theNASEM focusing on the current state of knowledge ➡️ practical lessons learned. Session 1 starting now.
Live-tweets below
#EHMI #NASEM #EnviroHealthMatters
2/ @Don_Milton summarizes evidence that saliva PCR much better at catching COVID positive cases than PCR from nasal swabs.
3/ @Don_Milton: It's the *combination* of masks, ventilation, filtration that can dramatically reduce spread
Airborne Transmission of SARS-CoV-2: What We Know academic.oup.com/cid/advance-ar… Paper from our @theNASEM #EnviroHealthMatters workshop. Source-to-dose framework, like for particulate matter and health effects, and 4 critical questions: /1
Q1: What size particles are generated by people & how do they spread in air? A: Large range of sizes and concentrations, aerosols+droplets important at short range (<1.5 m), aerosols dominate exposure at longer range (>1.5 m). /2
Q2: Which size particles are infectious and for how long? A: <5 μm and probably larger, half-life is around 1 hr /3
Here is a summary of the #EnviroHealthMatters workshop. shorturl.at/iJNV7
Q1: Layered control is needed. Needs to be a package @PublicHealth
Should masks be racial because of African American viewpoints from racial profiling matters. #MasksWork #EnviroHealthMatters
Location to quarantine outside home or social services needed and old buildings are the problem #EnviroHealthMatters. Windows closed in urban or resources in rural places
Nicole Alexander Scott @RIHEALTH says that the change in the masks being critical. #EnviroHealthMatters
Masks need to be mandatory at schools in RI and nationwide @meganranney @FutureDocs @IMPACT4HC @HelenBurstin #EnviroHealthMatters
Structural environments, not race, is what matters, which requires adjustments in the public health solutions for vulnerable communities #EnviroHealthMatters
Q8: With age, sex, and genetics being different, should we make different recommendations for mitigation strategies? You need to be more aggressive with regards to the elderly.
Should treatment be age dependent? #EnviroHealthMatters #MedTwitter
Q9: Answer: Evidence suggests age should make a difference.
Q1: Does risk increase over time? Yes but each day is unique. #getusppe #EnviroHealthMatters
Q2: Does the same pathway occur? Yes but there is a tissue driven difference. #envirohealthmatters #medtwitter
T Cell decline varies by both age and gender #epitwitter #MedTwitter
Sex is affected by the social determinats of health #EnviroHealthMatters @meganranney @jeremyfaust @JohnsHopkinsSPH
A male bias has been seen in deaths #EnviroHealthMatters #epitwitter
Men have double compared to women the rate of death in most places
Obesity, diabetes and high blood pressure affects virus load. Mouse have similar comorbidies as humans. #EnviroHealthMatters
Age difference also matters 2.5 or 20 month is also age dependent. Age matters not dose. #epitwitter
Age response varies based on host conditions, but genetics also matter. #EnviroHealthMatters
#EnviroHealthMatters using four different sizes in impactors, at 9.9, 5.3, 2.5, or 1.0 microns,
No difference between ID5 and ID50
For nasal watch, ferret to ferret, note the d5, d50, and d95 is a ration of 1:2:3 to pass through. #EnviroHealthMatters
#EnviroHealthMatters Critical question 4: what is infectious dose and disease relationship? #MedTwitter @CarlosdelRio7 @IDSAInfo @theNASEM
The determination is for common cold, the ID50 (infectious dose for 50%) is between 13 or 63 viral particles. #EnviroHealthMatters
They use between 10 and 1000.
Q8: Has there been discussion about multiroom office or general office? @danaparish
They suggest no, but see this study though on homes. #envirohealthmatters bloomberg.com/news/articles/…
This affects the meat packing plants particularly as mentioned yesterday. #EnviroHealthMatters
Q7: Should ceiling fans be used? The answer is that fans are NOT recommended due to increasing distribution throughout the room. For upper room disinfection, that is ok. #EnviroHealthMatters
Ceiling changes also can dilute the air, it could reduce the infectious dose. The 15 minute standard is arbitrary recirculated air increases the exposure period. #EnviroHealthMatters
In order words, this requires a room by room analysis.
Q6: What should the standards for ventilation, and does that equal clean air? Recirculated but not cleaning the air spreads disease. They recirculate 80% of the air. #EnviroHealthMatters
Recirculation to save energy matters. Don't forget the study on the flu in the dorm though. #EnviroHealthMatters
This has been used and can be used to determine maximum occupancy. #EnviroHealthMatters
Q3: We know too little about expired flow, including distance travelled. #EnviroHealthMatters
We assume covid is similar to influenza. Measurement technology is needed. #EnviroHealthMatters
Room scale viral spread exists and needs to be considered. But this does not have a transfer factor between breathing and emissions. #EnviroHealthMatters s
Q2: What about dentist offices? They produce high risks and the PPE [not a N95]. This creates a bit of airborne transmission that RDH's can inhale. #EnviroHealthMatters
Closed environment with low ventilation makes dental offices high risks. [Especially with lack of heightened ventilation]. (1/
@ShellyMBoulder recommends 30 minutes and taking a break with at least one air change. (2/
Yes. Low income populations live in underventilation and over crowded housing is a major risk factor. This is not a causal connection, but does come back to historical racism.
A congregate homeless environment of 5-7 people had quick spreading. #EnviroHealthMatters
Cloth mask reduce aerosols by 66%-75% for cloth masks or up to 83% for surgical masks. @WearingisCaring #EnviroHealthMatters
1000 viruses to 40 viruses from universal masking. My mask protects you and me. #MaskUp #MasksSaveLives @FutureDocs @bethlinas @HelenBurstin @ShikhaJainMD #EnviroHealthMatters
Random controlled trials unethical and confounding factors make them ineffective for masks. #EnviroHealthMatters
I have a question for #MedTwitter #epitwitter #NurseTwitter #IDtwitter #sciencetwitter #EnviroHealthMatters: Should we have a mask mandate now in all indoor public places and when near others or likely to be near others?
@DrRobDavidson did a poll asking if there should be any medical exemptions for mask wearing. 93% of the 890 respondents said No.
Mask wearing should not be controversial. The evidence is overwhelming that #MasksWork. I am a proud signer of @IMPACT4HC petition #AmericaMaskUp change.org/AmericaMaskUp
What are the high risk methods for indoors? #EnviroHealthMatters Remember masks are needed indoors.
@Don_Milton used the 3C's and says masks + distance helps. @CathNoakes mentions time and says we need masks + focus on winter, believing going inside is a risk. #EnviroHealthMatters
Kanta Subbarao says the viral load, determining who is the superspreader, envirometal, and ventilation. She wants to find out who sheads more. #EnviroHealthMatters
Q6: What about the salivia and the oral secreations? #EnviroHealthMatters Answer is activities based.
How does it change over time as transmission continues. Is the PCR test enough? #EnviroHealthMatters Or do the droplet create mid illness?
Or does the droplet + aerosol still result in a severe illness or cause the overresponse of the immune system requiring steriods like dethamexazone? #EnviroHealthMatters
Q4: Exhaled breath understand superspreading? This was from session 1 and the answer is yes. #EnviroHealthMatters
Actually Q5
Q3: What about the flu? Not suprised if we see something similar. But is that the main route of transmission for the flu? #EnviroHealthMatters
That is not the epidemological effect for the flu / COVID/ #epitwitter #EnviroHealthMatters
What about rhinovirus? #EnviroHealthMatters, Rhinovirus epidemics were not seen by Hopkins.
Q1: What types of enviroments be conducted for SARS-COV-2 spread? #EnviroHealthMatters
We need studies to prove epidemological data. Look at this if you have questions. #EnviroHealthMatters northwell.edu/coronavirus-co…
Q2: Built in enviromental or engineering controls matter? Remember, influenza in college dorms has been proven by studies by a factor of four by ventilation. #EnviroHealthMatters
