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Proof of asymptomatic spread?
There are lots of places requiring COVID testing even if you are asymptomatic. That means there must be scientific evidence of asymptomatic spread. Where is it?
SurfAir is requiring me to be tested prior to their flights, even if I’m asymptomatic.
I asked them for the scientific evidence of asymptomatic spread. You know, like a randomized trial that might look something like this:
You have 20 groups of people who have tested negative on an antigen and PCR tests. You put an asymptomatic positive in 10 of the groups. You put a symptomatic positive in the other 10 groups. All groups are confined to a small unventilated room for 1 hour. You then measure the infection rates several days later. You may need to repeat to get statistical significance.
Note: this can be done with primates (or politicians) instead of people if the IRB decides doing this on people is unethical.
They did not respond.
There is no such randomized trial.
We know from real-world examples, that asymptomatic spread is very hard to find so if it exists, it is likely only going to be measured in a large randomized controlled trial.
Lack of proof of asymptomatic spread
This is a study (Post-lockdown SARS-CoV-2 nucleic acid screening in nearly ten million residents of Wuhan, China) that looked at several hundred asymptomatic people (tested positive for COVID, but had no symptoms). They looked at 1,174 close contacts of these asymptomatic individuals and could not find ONE CASE of a person getting COVID from the asymptomatic people. It's difficult to prove a negative, but if you can't find one case out of nearly 1200 people who were in close contact to asymptomatic individuals, then we can at least conclude that if asymptomatic spread happens at all, it's extremely rare.
"There were no positive tests amongst 1,174 close contacts of asymptomatic cases. "
Other studies showing no asymptomatic spread
Household Transmission of SARS-CoV-2: A Systematic Review and Meta-analysis
The chance of asymptomatic spreading is 0.7% within a household. (And the study below shows that this spreads immunity, not the disease)
This is 3 mins from the WHO saying the same thing that asymptomatic spread is very rare (June 2020, so alpha variant).
There is a RCT talking about asymptomatic transmission. It is discussed in the first part of this video by Dr Chris Martenson.
This is a must read article discussing a pre-print about asymptomatic transmission, from Aaron Siri on Substack:
This is the link to the preprint he discusses https://www.medrxiv.org/content/10.1101/2021.07.31.21261387v4.full.pdf
No Significant Difference in Viral Load Between Vaccinated and Unvaccinated, Asymptomatic and Symptomatic Groups When Infected with SARS-CoV-2 Delta Variant
shows you can’t use PCR thresholds to determine whether someone is symptomatic.
Tony Fauci on asymptomatic spread
This is 46 seconds of Fauci explaining asymptomatic spread is rare. He said even if it exists, "in all the history of respiratory borne viruses of any type, asymptomatic transmission has never been the driver of outbreaks. The driver of outbreaks is always a symptomatic person.”
In short, we should focus all our efforts on symptomatic people.
The evidence is clear: asymptomatic spread, if it exists, is negligible and even if it does exist, is more likely to confer immunity than disease.
Even Tony Fauci concurs that the focus should be on symptomatic people.
Why we are testing asymptomatic people is another insanity and more proof that the CDC is totally incompetent to manage this pandemic. New leadership is required.