The worldwide Coronavirus
Differentiating between COVID-19 and the flu:
As the flu season begins, it is important to be able to differentiate between the common flu and COVID-19. Some differences are that COVID causes:
- Shortness of breath or difficulty breathing. The flu usually has neither of these symptoms.
- Long term fever, while the flu causes fever that typically lasts only one to three days.
Bluish lips or face. The flu does neither. 1
How COVID-19 might spread from person to person, according to the Centers for Disease Control and Prevention (CDC):
Back in 2020-FEB, during the very early days of the COVID-19 pandemic in the U.S., the CDC published a response to the outbreak. They said that:
"Areas for additional COVID-19 investigation include:
'... studying the relative importance of various modes of transmission, including the role of droplets, aerosols, and fomites; understanding these transmission modes has major implications for infection control and prevention, including the use of personal protective equipment.' ..." Â 2
A "droplet" is a very tiny spherical liquid object, ranging in size from what one CDC scientist called a "big goober" to one that is much smaller.
An "aerosol" is an abbreviation of "aero-solution." They are typically very tiny solid or liquid particles, equal or less than 1 ÎĽm (micro-meter) in diameter. This is MUCH smaller than a droplet. Some aerosols are sometimes seen in nature, in the form of fog, mist, dust, smoke, etc.
- The term "microdroplet" is sometimes used to refer to particles intermediate in size between a droplet and an aerosol.
A "fomite" is an object that can be contaminated by bacteria, fungi, or viruses, when an infected person touches them. Other persons, who touch the same object later, can then pick up the contamination and become infected themselves -- particularly if they later touch their nose or an eye. Typical fomites are dishes, doorknobs, utensils, furniture surfaces, handrailings, and clothing.
The CDC later stated that COVID-19 was primarily spread when the an infected person coughs or sneezes. They stated that the virus is carried by small respiratory droplets, which typically fall to the ground within six feet due to gravity. If other people nearby wear masks, such droplets are effectively filtered out of the air by the cloth in the masks. If other people stay more than about 6 feet (2 meters) away from an infected persons they are relatively safe from becoming infected.
However, there was a growing belief among many researchers around the world that the virus also spreads embedded within "aerosols" whose diameter is typically measured as 1 micrometer or less -- orders of magnitude smaller than droplets. They exit an infected person's body when they talk, sing, cough, sneeze, or simply breath normally. They are so small that they can easily flow through most masks worn by people nearby. Also they can travel much farther than droplets. Some researchers felt that aerosols are the main method by which COVID-19 spreads.
On 2020-JUL-06, Lidia Morawska and Donald Milton wrote an article in an Oxford Academic Journal, titled: "It is time to address airborne transmission of Coronavirus Disease 2019 (COVID-19)."Â 19 They said:
"There is significant potential for inhalation exposure to viruses in microscopic respiratory droplets (microdroplets) at short to medium distances (up to several meters, or room scale), and we are advocating for the use of preventive measures to mitigate this route of airborne transmission. ... airborne transmission appears to be the only plausible explanation for several superspreading events investigated."
On 2020-SEP-18, on their web site, the Centers for Disease Control and Prevention, the CDC confirmed the belief that the virus is spread by both droplets and aerosols.Â 3,4 They discussed that:
Each time an infected person breathes out, talks, or sings, the virus can travel through the air, carried by tiny respiratory aerosols in their breath. The aerosols remain suspended in the air for a while -- perhaps travelling well beyond 6 feet. They can easily be inhaled by others who are nearby, causing others to become infected. The CDC warned that badly ventilated indoor spaces are particularly dangerous.
Whenever an infected person sneezes or coughs, a much larger amount of the virus is ejected into the air embedded in droplets which are much larger than aerosols. The CDC article said that the aerosols: "... can be inhaled into the nose, mouth, airways, and lungs and cause infection. This is thought to be the main way the virus spreads."Â 5
They also said that asymptomatic people who have been within six feet of a another person for over 15 minutes who was known to be newly infected should be tested. They should also self-quarantine at home for 14 days.
This was a major announcement by the Centers for Disease Control and Prevention.
Abraar Karan, a physician at Brigham and Women’s Hospital in Boston and Harvard Medical School, responded to the article by tweeting:
"We have been saying 'wear a mask' and '6 feet apart' for months. Cloth masks are not designed to block aerosols. And 6 feet apart may be insufficient, [especially when] indoors [with] poor ventilation.
Jose-Luis Jimenez, a chemistry professor at the University of Colorado, said that the CDC article was a:
"... major change. This is a good thing, if we can reduce transmission because more people understand how it is spreading and know what to do to stop it."
Linsey Marr, a professor of civil and environmental engineeringÂ atÂ Virginia Tech wrote:
"There is an overwhelming amount of scientific evidence that aerosols are an important transmission route for COVID-19. The new wording that was published [on SEP-18 by the CDC] acknowleged that inhalation of aerosols (or microscopic droplets) is the main way that the virus spreads. CDC's recognition of airborne transmission would mean that that policies should emphasize wearing masks at all times in public buildings and ensuring good ventilation and filtration to control the pandemic."Â 6
Her posting would seem to imply that masks will effectively filter aerosols.
Webmaster's personal note:
The SEPT-15 article by the CDC made sense to me. I had previously felt secure while wearing a cloth mask whenever I was outside my home. But after reading the CDC article, I realized that aerosols containing the COVID-19 virus might be breathed out by an infected person, spread out in the air, travel right through my cloth mask, and infect me. I no longer felt secure. This motivated me to leave my home only for important tasks. Fortunately, I live in Kingston, ON, Canada -- population 137,000 -- where the number of active COVID-19 cases is typically in the single digits.
2020-SEP-03: There may be a link between COVID-19 risk and Vitamin D deficiency:
Ben Cousins wrote an article on CTV News, stating that:
"A new study suggests a correlation between vitamin D deficiency and the risk of contracting COVID-19, though the authors believe further research is needed.
The study, published Thursday in the Journal of the American Medical Association, examined 489 people who had been tested for COVID-19 between March 3 and April 10 and had been tested for vitamin D deficiency in the year prior.
The results showed that 19 per cent of the vitamin D deficient people tested positive for COVID-19, compared to 12 per cent of the vitamin D sufficient people." 21
Also, research in New Orleans, LA found that all of its sickest COVID-19 patients were deficient in Vitamin D. Research in Ireland showed that COVID-19 infections and deaths were lower in those countries where Vitamin D is added to food, or where the population is urged to take Vitamin D supplements.
In the past, studies have shown that Vitamin D deficiency is linked to pneumonia, tuberculosis and bronchiolitis. 21
2020-SEP-21: The CDC removed their article from their web site!!
Tim Elfrink, et al., at The Washington Post, wrote an article with a remarkable title: "CDC reverses itself and says guidelines it posted on coronavirus airborne transmission were wrong." 7
A top CDC official said that the guidelines were removed because they do not "... reflect our current state of knowledge."
Jay Butler, the CDC’s deputy director for infectious diseases, subsequently indicated that the Friday message had been posted in error. He said:
"Unfortunately an early draft of a revision went up without any technical review." 7Â
Later, in early 2020-OCT, the CDC clarified their position, stating:
"There is evidence that under certain conditions, people with COVID-19 seem to have infected others who were more than six feet away. These transmissions occurred within enclosed spaces that had inadequate ventilation. Sometimes the infected person was breathing heavily, for example while singing or exercising."
"Under these circumstances, scientists believe that the amount of infectious smaller droplet and particles produced by the people with COVID-19 became concentrated enough to spread the virus to other people. The people who were infectedÂ were in the same spaceÂ during the same time or shortly after the person with COVID-19 had left."
Today’s update acknowledges the existence of some published reports showing limited, uncommon circumstances where people with COVID-19 infected others who were more than 6 feet away or shortly after the COVID-19-positive person left an area. ...”
[This happened in] “poorly ventilated and enclosed spaces that often involved activities that caused heavier breathing, like singing or exercise. Such environments and activities may contribute to the buildup of virus-carrying particles."Â 18
This topic continues in the next article
[Sorry, my 2020 DreamWeaver program does not allow me to delete the empty space below, or properly center the above line.]
The following information sources were used to prepare and update the above
essay. The hyper links are not necessarily still active today:
Adam Feinstein, "Inexpensive steroids reduce deaths of hospitalized Covid-19 patients, WHO analysis confirms," Stat News, 2020-SEP-02, at: https://www.statnews.com/
Dan Evon, "Was Sturgis Motorcycle Rally Responsible for 250K Coronavirus Cases?," Snopes, 2020-SEP-10, at: https://www.snopes.com/
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Daniel B. Jernigan, MD, CDC COVID-19 Response Team, "Morbidity and Mortality Weekly Report," CDC, 2020-FEB-25, at: https://www.cdc.gov/
- "The COVID-19 brief," CTV News, 2020-SEP-23, via the Mid-Week Catchup Email.
"Johnson & Johnson’s Vaccine Advances, Sparking Optimism in Race," New York Times, 2020-SEP-23, at: https://www.nytimes.com/
David Liev & Jim Salter, "Missouri governor, opponent of mandatory masks, has COVID-19," ABC News, 2020-SEP-23, at: https://abcnews.go.com/
Laura King & Chris Megerian, "Trump's illness appars more serious," Los Angeles Times, 2020-OCT-04, at:latimes.com
John Wagner, et al., "Election live updates: Trump tweets that he’s leaving hospital today," The Washington Post, at: https://www.washingtonpost.com/
Lena H. Sun & Ben Guarino, "CDC says airborne transmission plays a role in coronavirus spread in a long-awaited update after a website error last month," The Washington Post, 2020-OCT-05, at: https://www.washingtonpost.com/
Lidia Morawska and Donald Milton, "It Is Time to Address Airborne Transmission of Coronavirus Disease 2019 (COVID-19)," Clinical Infectious Diseases, 2020-JUL-06, at: https://academic.oup.com/
Madison Dapcevich, "Did CDC Report ‘Majority’ of People Who Contracted COVID-19 Wore Masks?," Snopes.com, 2020-OCT-16, at: https://www.snopes.com/
Ben Cousins, "Research makes possible link between COVID-19 risk and vitamin D deficiency," CTV News, 2020-SEP-03, at: https://www.ctvnews.ca/
"The John Snow Memorandum at: https://www.johnsnowmemo.com/
Copyright © 2020 by Ontario Consultants on Religious Tolernace
Latest update: 2020-
Author: B.A. Robinson
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