1/With the 4,456 new official Covid-19 cases in Ontario today and the majority of Covid-19 cases in Canada now being VOCs, maybe it's a good time to update what we know about transmission. Thanks to @DFisman for editing and fact-checking and @realsarahpolley for the inspiration. 
2/Transmission:
•Covid-19 is airborne: the virus can hang suspended in the air for hours and travel much further than 2m (6’), especially indoors
•Covid-19 is airborne: the virus can hang suspended in the air for hours and travel much further than 2m (6’), especially indoors
3/This includes people who have not yet developed symptoms (pre-symptomatic) and those who never develop symptoms (asymptomatic)
•The majority of Covid-19 cases in Canada are now the variants of concern, which are 1.2-2.2 times more contagious, and 60% more deadly
•The majority of Covid-19 cases in Canada are now the variants of concern, which are 1.2-2.2 times more contagious, and 60% more deadly
4/•The highest risk individuals for COVID-19 infection in Ontario are now young, healthy people 10-39,
•1 dose provides protection against severe illness, but you are not fully protected until 2 wks after your second dose; the level of protection may change as VOCs evolve
•1 dose provides protection against severe illness, but you are not fully protected until 2 wks after your second dose; the level of protection may change as VOCs evolve
5/•Cloth masks do not offer enough protection from Covid-19 indoors unless they are lined with polypropylene; use KN95 masks or those with similar levels of filtration
•Mask fit is crucial; even small gaps reduce your protection. Check your fit:
•Mask fit is crucial; even small gaps reduce your protection. Check your fit:
6/•Outdoors is safer than indoors; transmission is greatly reduced (at least 19 times), but transmission can occur in close or crowded conditions and masking further reduces risk
7/Seriousness of Illness
•Young healthy people with Covid-19 are deteriorating quickly at much higher rates
•Brain disorders affect 1 in 3 Covid-19 survivors
•1 in 4 people diagnosed with even mild cases Covid-19 report long Covid-19 symptoms months after recovering
•Young healthy people with Covid-19 are deteriorating quickly at much higher rates
•Brain disorders affect 1 in 3 Covid-19 survivors
•1 in 4 people diagnosed with even mild cases Covid-19 report long Covid-19 symptoms months after recovering
8/•The death toll of Covid-19 is likely much higher than official numbers as evidenced by the much higher than the average expected deaths all over the world
See this w/ footnotes at gisele-gordon.medium.com. Drs and scientists: THANK YOU. We are listening. Edits are welcome
See this w/ footnotes at gisele-gordon.medium.com. Drs and scientists: THANK YOU. We are listening. Edits are welcome
@threadreaderapp unroll
@jimbo10610 correctly pointed out that the article I used for this footnote mentions aerosols suspended in the air for minutes, not hours --these two articles are better sources
nature.com/articles/d4158…
nytimes.com/2020/07/06/hea…
nature.com/articles/d4158…
nytimes.com/2020/07/06/hea…
"Some infections can be spread by exposure to virus in small droplets and particles that can linger in the air for minutes to hours (>30 minutes to multiple hours)...
...These viruses may be able to infect people who are further than 6 feet away from the infected person or after that person has left the space" nursesunions.ca/cfnu-research-…
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