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183 votes
Accepted

Do studies show that viruses are contagious?

A qualified doctor challenging the Germ Theory of Disease after 1900? Wow. This is just a smattering - just a random tasting - of the thousands - or perhaps millions - of studies showing that ...
Oddthinking's user avatar
  • 144k
91 votes

Has a virus ever escaped a high-level virus lab "such as the one in Wuhan"?

Q Has a virus ever escaped a high-level virus lab? Yes, depending on definitions. How deadly pathogens have escaped the lab — over and over again Most appropriate candidates for an inappropriately ...
LangLаngС's user avatar
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79 votes
Accepted

Was the virus which causes COVID-19 made in a Chinese lab?

Biological and genetic analysis of the virus suggests that the virus evolved naturally, i.e. was not "made in a Chinese lab". However, as Lang Lang's answer notes, it is arguably premature ...
Colin's user avatar
  • 1,102
47 votes

Has the flu already killed 20,000 Americans during 2019-20 flu season?

Fox News links to the CDC source which says: CDC estimates that so far this season there have been at least 34 million flu illnesses, 350,000 hospitalizations and 20,000 deaths from flu. By "...
tim's user avatar
  • 52k
24 votes

Was the virus which causes COVID-19 made in a Chinese lab?

It is still too early to definitively tell. We do not know its origin for sure. We have neither any hard evidence for nor anything good against this claim. What we do have is a few plausibility ...
LangLаngС's user avatar
  • 44.1k
21 votes

In February 2020, did Tencent release accurate statistics for the Wuhan coronavirus that were 10 times the official figures?

The Tencent screenshot is almost certainly a hoax, for the simple reason that such screenshots are extremely easy to fake. For example, here's how easy it is to get a "screenshot" of the New York ...
krock's user avatar
  • 319
20 votes

Coronavirus - Is it safe to receive a package from China?

In an attempt to back up the WHO's claim but not using their data or statement. The 'Corona 2019' virus is a specific variant of the more general corona virus family. Further, this family is part of a ...
Jarrod Christman's user avatar
20 votes

Does SARS-CoV-2 infect via asymptomatic transmission?

There is actual scientific evidence for asymptomatic Sars cov 2 transmission. I found about 50 scientific publications in the peer-reviewed literature that clarify this information (in a 10-minute ...
If you do not know- just GIS's user avatar
19 votes

Coronavirus - Is it safe to receive a package from China?

You are quoting the WHO and then say 'no citation is provided'. The WHO is the source. They are well equipped to research these kind of questions and it is part of their job to issue recommendations ...
quarague's user avatar
  • 1,848
18 votes

Has SARS-CoV-2 been purified in a lab? If not, does this imply that the PCR test for it is not specific?

It is essentially irrelevant whether the virus was purified, and the reason it wasn't in the cases that the Youtube video mentioned is that it simply was not necessary or useful to add a purification ...
Mad Scientist's user avatar
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17 votes

Do surgical masks help prevent the spread of COVID-19 from infected members of the public?

We finally have a study that examines surgical masks and their effectiveness under different viral-load situations and compares their effectiveness to other types of masks. The research provides the ...
If you do not know- just GIS's user avatar
15 votes

Has the flu already killed 20,000 Americans during 2019-20 flu season?

The number of confirmed deaths due to influenza has been much less than 20,000 for the 2019-2020 flu season through March 5th 2020. According the the US National Center for Health Statistics, the ...
DavePhD's user avatar
  • 108k
14 votes

Has SARS-CoV-2 been purified in a lab? If not, does this imply that the PCR test for it is not specific?

The whole you-didn't-image-this-in-a-highly-purified-sample is a red herring with regard to determining whether a (suspected) virus is a "a brand new viral pathogen" or not. Nobody does that ...
got trolled too much this week's user avatar
13 votes
Accepted

Does a child die from malaria every two minutes?

According to the World Health Organization: More than two thirds (70%) of all malaria deaths occur in this age group. In 2015, about 305,000 African children died before their fifth birthdays. ...
Online User's user avatar
  • 30.3k
13 votes

Does this article make a valid claim that SARS-CoV-2 isolation hasn't been demonstrated yet?

This claim seems to have originated from a profound misunderstanding of the word "quantified", perhaps an unfortunate consequence of the technical shorthand that scientists like to use. The ...
0xDBFB7's user avatar
  • 1,934
10 votes

Does SARS-CoV-2 infect via asymptomatic transmission?

There are many techniques that have been used to demonstrate the importance of asymptomatic or pre symptomatic transmission of SARS-CoV-2. Many of these are population/statistically based, which you ...
Dave's user avatar
  • 993
8 votes

Is 8% of human DNA from viruses?

I wish to add to the above answer. Approximately 9% of the genome is viral in origin, but current research suggests there is less of 'you' than there are other viral related sequences. Here is a very ...
Richard Stanzak's user avatar
8 votes
Accepted

Are 40% of the oceans' bacteria killed by viruses every day?

According to Bacteriophage Distributions and Temporal Variability in the Ocean’s Interior mBio Nov/Dec 2017 Volume 8, e01903-17: Phages have been shown to kill hosts at rates of up to 20 to 40% of ...
DavePhD's user avatar
  • 108k
7 votes

Does dry air promote the spreading of respiratory viruses better than wet air, ceteris paribus?

This is a rather tentative answer since the evidence still looks fairly contradictory to me, but the BBC has an article that reiterates what DW says, with more detail: Thanks to the laws of ...
got trolled too much this week's user avatar
6 votes

Is there a million € reward for proof of Sars cov 2 isolation?

This is a trick developed by Stefan Lanka, who is a close associate of Samuel Eckert. He has already created an identical reward for isolation of the measles virus. Under German law, they do not ...
Avery's user avatar
  • 46.3k
6 votes

Was the virus which causes COVID-19 made in a Chinese lab?

As has been stated, there is no evidence that such is the origin. From the other direction, the phylogeny of the virus seems to indicate that it diverged from an existing virus in bats. And, that ...
puppetsock's user avatar
6 votes

Why is the estimated fatality rate of the 2019-nCoV virus so low?

Take a look at this live map of the virus. The calculation is based on the number of deaths, divided by the number of confirmed cases (multiplied by 100 to get it as a percent%). As of February 3rd ...
Entropy's user avatar
  • 2,674
6 votes

Has a virus ever escaped a high-level virus lab "such as the one in Wuhan"?

According to Agro-terrorism : "Accidental releases of FMD virus from research laboratories have occurred in the United Kingdom [reference 38]. Historically, FMD virus was accidentally released from ...
DavePhD's user avatar
  • 108k
5 votes
Accepted

Were millions of people infected by SARS?

No. The premise behind the article seems to be that SARS was widely prevalent (in some areas), >10% of people were infected, without severe symptoms, and developed antibodies that can now be tested ...
Oddthinking's user avatar
  • 144k
5 votes
Accepted

Was the yellow fever virus a past standardized biological weapon in the US Army?

The word "standardized" seems like an over-statement to me. The US certainly did investigate the possibility of using yellow fever as a bioweapon during the Cold War, according to Hay (1999): The ...
Brian Z's user avatar
  • 7,728
5 votes

Do surgical masks help prevent the spread of COVID-19 from infected members of the public?

First, surgical masks (especially doubled up) work fine for keeping you safe from aerosols. Cloth masks also work to some extent, but not quite as much. This has been shown in a number of studies, but ...
CJR's user avatar
  • 5,720
4 votes

Do surgical masks help prevent the spread of COVID-19 from infected members of the public?

It would appear to be difficult to test this with a single direct experiment, but we can approximations based on aerosol transmission models. A recent paper, SARS-CoV-2 aerosol transmission in ...
JonathanReez's user avatar
  • 10.3k
4 votes

Was the yellow fever virus a past standardized biological weapon in the US Army?

For a slightly more extensive summary that doesn't require someone to read 20-page paper... Jeffrey Lockwood (who also wrote a book on the topic of entomological warfare, writes in a 2012 paper ...
got trolled too much this week's user avatar
4 votes

In February 2020, did Tencent release accurate statistics for the Wuhan coronavirus that were 10 times the official figures?

Tencent denied those figures were ever published on their site. And there's seemingly no corroborating evidence besides that screenshot: The screenshot was first picked up by NTDTV, a U.S.-based, ...
got trolled too much this week's user avatar
3 votes

Do young people with no previous pathologies, end up admitted with bilateral pneumonia and serious breathing difficulties due Covid-19?

COVID-19 is so new that there are a lot of things that are uncertain. There is some anecdotal evidence that young people can develop significant complication. For example, this article in the ...
ventsyv's user avatar
  • 7,124

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