Corona: How well do visors and filter masks protect? Results of new US video study surprise

Many people prefer to wear visors than masks as mouth and nose protection.

US researchers have now examined in a study how well these protect against droplet infection.

• In

  Germany

  , there has been

  a

  mask requirement

  since the outbreak of the

  coronavirus *,

  for example in public transport and supermarkets.

• Many people prefer to wear

  visors

  .

• US researchers have now investigated how different

  face masks

  and

  visors

  can protect

  against

  droplet infection

  .

Boca Raton / Munich -

Since the outbreak of the

, it has become mandatory to

wear

, for

example in public transport or in supermarkets.

Experts are warning of the

the pandemic.

Many people now prefer to use

than

.

You find this more pleasant.

In addition, the facial expressions behind the transparent plastic disc remain recognizable.

But how well do such

protect

?

Researchers from

have now used a

test how different

and

can protect

against

.

Corona: US researchers are testing the protective function of face masks and visors

The American scientists

and

simulated the emission of droplets when

and

using a special doll.

Using

in a dark room, they tracked the movement of the artificially produced droplets.

The

published their results in the

journal “Physics of Fluids”.

Corona: Visors and masks with valves do not protect against the distribution of the droplets

Through the illustration, the

were able to

observe that the

initially

spread downwards along

the

, i.e. the forward movement of the exiting air was prevented.

However, the droplets then spread around the

in the room.

Just a few seconds after the simulated cough, a

formed in

front of the

.

A new visual experiment from Florida Atlantic University researchers shows why you shouldn't rely on face shields and face masks with valves.

@ReeveWill reports.

https://t.co/DT0fj3HCZd pic.twitter.com/x8gSK97NI4

- Good Morning America (@GMA) September 2, 2020

The

found something similar

in

with a

.

You could observe that the air was

out

through the openings on the valve

.

The

spread out in the room.

Such a

is therefore not suitable

for preventing

the spread of the

by an infected person.

The

filter the inhaled air, but not the exhaled air.

Coronavirus: US researchers recommend avoiding visors and masks with valves

According to

the American

,

and

are

less effective than

and

for protecting against

with the

.

These were also

tested

in the

.

Special respiratory protection masks (N95 standard) and simple cloth masks do not offer 100% protection either, but let through fewer droplets in the experiment.

The

therefore recommend avoiding wearing

and

, despite the possibly greater comfort

.

Again and again you see people who

only pull

their

over their mouth.

A virologist explains what to think of this application.

In coaches it also happens that the

ignored.

Product warnings of ineffective

already been issued more frequently

.

After the end of the summer vacation, a

in Bavaria's schools 

- for the first nine days of school.

List of rubric lists: © picture alliance / Jane Barlow / PA Wire / dpa