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.

Papers attempted to assess this using statistical modeling (another example) which are not reliable enough to make a decision of this magnitude.

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

A study on infectivity of asymptomatic SARS-CoV-2 carriers

Covid-19: Asymptomatic cases may not be infectious, Wuhan study indicates

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)

Study finds evidence of lasting immunity after mild or asymptomatic COVID-19 infection

Wuhan mass screening identifies hundreds of asymptomatic cases, but none were infectious

Asymptomatic transmission of COVID-19 didn’t occur at all, study of 10 million finds

Evidence of asymptomatic spread is insufficient to justify mass testing for Covid-19

CT imaging and clinical course of asymptomatic cases with COVID-19 pneumonia at admission in Wuhan, China

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.

Link to study here https://www.thelancet.com/journals/laninf/article/PIIS1473-3099(21)00648-4/fulltext

This is a must read article discussing a pre-print about asymptomatic transmission, from Aaron Siri on Substack:

Study Destroys Justification for Vaccine Mandates

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.

Summary

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.