Researchers from the USA examined various corona masks in a test.
According to the study, people can become infected with Covid-19 despite having mouth and nose protection.
According to a
study
, you can become
infected with Corona *
despite using
mouth and nose protection
.
US researchers
examined various corona masks
for the
test
.
Three
masks
do particularly well, one protects almost 100 percent.
Kassel - Anyone who coughs or sneezes from a short distance can become
infected
with the
coronavirus
despite having mouth and nose protection
.
This was the result of a US study of five different masks.
Three
corona masks
offered
good protection against droplets with
virus particles
in the
test
.
“A
mask
definitely helps.
But if people are very close to each other, there's still a chance the
virus could
spread or get sick, ”says medical doctor Krishna Kota.
The
study
by Kota and his colleagues at
New Mexico State University was published
in the journal Physics of Fluids.
Corona masks put to the test: Researchers examine the spread of the droplets
For the
test
, the scientists built an apparatus in which they
sprayed
the tested
corona masks
at a distance of 1.83 meters with 40,000 droplets (for a sneeze) and 3,000 droplets (for a cough).
The speed in the middle of the droplet cloud was 11.5 kilometers per hour.
+
According to a test, anyone who sneezes or coughs from a short distance runs the risk of becoming infected with corona despite face and nose masks.
(Symbol photo)
© Karl-Josef Hildenbrand / dpa
Risk of corona infection: According to the test, a simple cloth mask provides limited protection
A 2-ply
fabric mask
let 3.6 percent of the droplets through.
Previous
studies show
that a sneeze
can contain
up to 200 million
virus particles
.
In such a case, another 7 million virus particles would come through the mask, which is far more than the number of 1,000 particles that, according to previous findings,
can be sufficient
for a
corona infection
.
With another 2-layer fabric mask,
however, only 1.7% of the droplets came through
in the
test
, but this
mask was provided
with a
filter
for fine dust.
Test: These three masks provide good protection against corona infection
Only an
N95 mask
, which meets the standards of the American Federal Agency for Occupational Health Research, filters
all droplets from the air
during the
test
.
However, this only applies if another person sneezes or coughs.
If the mask wearer himself is the source of the cloud of droplets, 0.98 percent of the droplets can still penetrate the mask.
In this case,
surgical
masks and masks with fine dust filters
offer
even better protection.
These ensure that only 0.19 percent of the
corona
droplets penetrate.
Test of corona masks: keeping your distance is still important
“It's not just masks that help.
It's both the masks and
keeping your distance,
”emphasizes Krishna Kota.
The study confirms that wearing masks and keeping your distance in most cases
offer
good protection against
corona infection
, the researchers said.
+
The federal and state governments want to get the corona pandemic under control through the mask requirement.
How safe is mouth and nose protection?
(Symbol image)
© picture alliance / dpa / dpa-Zentralbild / Sebastian Kahnert
In
the
test,
however
, the US scientists
did not investigate
whether the
coronaviruses
can escape through the masks without sneezing or coughing
.
(Nail Akkoyun)
* hna.de is part of the nationwide Ippen-Digital editorial network.
List of rubric lists: © picture alliance / dpa / dpa-Zentralbild / Sebastian Kahnert