On 03/04/2023 22:22, T wrote:
> On 4/3/23 08:21, SteveW wrote:
>> On 03/04/2023 14:00, Joe wrote:
>>> On Mon, 3 Apr 2023 08:10:16 +0100
>>> alan_m <
ju...@admac.myzen.co.uk> wrote:
>>>
>>>> On 03/04/2023 04:31, Rod Speed wrote:
>>>>
>>>>> Must be why those taking covid swabs always use them.
>>>>
>>>> Extensively used in hospitals long before Covid, and not by the
>>>> patients.
>>>>
>>>
>>> Their purpose is to reduce spray from coughs and sneezes by people who
>>> have both hands in use all the time, such as operating theatre staff.
>>
>> And so they also work for helping protect people from those who may
>> have Covid, Flu or whatever, as long as the ill person is wearing one.
>> Less spray and travelling less distance, means less chance of a nearby
>> contact catching something.
>>
>
>
> Actually Steve, they do not.
>
> Please read the follow actual scientific studies:
>
>
> This one is from before the issues was monitized and politicized (2010):
>
> Face masks to prevent transmission of influenza virus: a systematic review
>
>
https://www.cambridge.org/core/journals/epidemiology-and-infection/article/face-masks-to-prevent-transmission-of-influenza-virus-a-systematic-review/64D368496EBDE0AFCC6639CCC9D8BC05
Which, right at the start, in the Summary, says "There is some evidence
to support the wearing of masks or respirators during illness to protect
others, and public health emphasis on mask wearing during illness may
help to reduce influenza virus transmission."
and that says, "The observed lack of effect of mask wearing in
interrupting the spread of influenza‐like illness (ILI) or
influenza/COVID‐19 in our review has many potential reasons, including:
poor study design; insufficiently powered studies arising from low viral
circulation in some studies; lower adherence with mask wearing,
especially amongst children; quality of the masks used;
self‐contamination of the mask by hands; lack of protection from eye
exposure from respiratory droplets (allowing a route of entry of
respiratory viruses into the nose via the lacrimal duct); saturation of
masks with saliva from extended use (promoting virus survival in
proteinaceous material); and possible risk compensation behaviour
leading to an exaggerated sense of security" and "We are uncertain
whether wearing masks or N95/P2 respirators helps to slow the spread of
respiratory viruses based on the studies we assessed."
> Or you can stick with "political science" and
> virtue signal by "wearing a mask"
Neither of those links show that masks do not help. The first suggests
that there is some evidence that it does and the second says that there
are many reasons why an effect may not have been seen and they are
uncertain of the results.
Between them they show that the likelihood of a beneficial effect is
greater than the likelihood of no effect, but the studies are not well
enough designed and run to be sure.