Talking could transmit SARS-CoV-2, early NIDDK research suggests

Share this & earn $10
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
Published at : 19 Jan 2021
61998 views
188
4

Early research by scientists at the National Institutes of Health suggests that droplets expelled while talking may transmit the virus that causes COVID-19. The scientists used powerful laser technology to reveal normally invisible saliva droplets that are generated by speech.

The paper describing this research, “Visualizing speech-generated oral fluid droplets via laser light scattering,” was published by the New England Journal of Medicine on April 15, 2020: https://www.nejm.org/doi/full/10.1056/NEJMc2007800?query=featured_home

COVID-19 is an emerging, rapidly evolving situation.

Get the latest public health information from CDC: coronavirus.gov

Get the latest grant and research information from NIH: nih.gov/coronavirus

---

Transcript:

Early research by scientists at the National Institutes of Health suggests that droplets expelled while talking may transmit the virus that causes COVID-19.

The scientists used powerful laser technology to reveal normally invisible saliva droplets that are generated by speech.

They found saliva could be a dominant pathway for transmission of microbes such as coronaviruses that cause respiratory diseases like COVID-19.

When we speak, we release tiny droplets that drift around in the air and can be inhaled by people near us.

If the droplets contain Coronavirus particles, those droplets could transmit a new COVID-19 infection.

To visualize them, a high-powered green laser is routed through optics to create a sheet of light that passes through slots cut into the sides of a cardboard box, whose interior was painted black.

HEPA-filtered air was blown down over the laser system and the box. The laser beam, though very intense, becomes difficult to see. However, when sticking a hand into the sheet of light, the hand and the interior of the box lights up brightly. As a control experiment, spritzing water droplets from a spray bottle over an opening on the top of the box produced a large number of bright light flashes.

When breathing normally, we don't see any flashes of light inside the box. So what happens when speaking the words, “Safe? Not safe!”

The flashes of light you just witnessed arose from the droplets of saliva spewing out of the speaker's mouth.

Ironically, one of the phrases that produces a large number of droplets is, “Stay healthy.”

See that again in slow motion.

“Stay healthy.”

COVID-19 is an emerging, rapidly evolving situation.

Get the latest public health information from the Centers for Disease Control and Prevention at coronavirus.gov and the latest grant and research information from the National Institutes of Health at nih.gov/coronavirus.
coronavirusCOVID-19SARS-CoV-2

Oftentimes by Solitary One

Oftentimes by Solitary One

Lockdown Daily Chat : Margin Levels for Retail Traders & Other Life Observations

Lockdown Daily Chat : Margin Levels for Retail Traders & Other Life Observations

Siamese Twins Finally Separated | Dying to be Apart | Only Human

Siamese Twins Finally Separated | Dying to be Apart | Only Human

Popularity of Soccer in the US

Popularity of Soccer in the US

"We are hoping to be one of the sports to be allowed to get back to play" | Wycliffe Ongori

"We are hoping to be one of the sports to be allowed to get back to play" | Wycliffe Ongori

Yo La Tengo - "Avalon Or Someone Very Similar"

Yo La Tengo - "Avalon Or Someone Very Similar"

UK GRIME/2019 MIX - DJ FURY

UK GRIME/2019 MIX - DJ FURY

The Limits of Understanding

The Limits of Understanding

The Art of Clean Code by Victor Rentea

The Art of Clean Code by Victor Rentea

Art Photography A powerful medium of expression || Straight Drive Panorama With Sudhanshu Mani

Art Photography A powerful medium of expression || Straight Drive Panorama With Sudhanshu Mani

Off The Beaten Track ( V3 vs SF250)Part 2

Off The Beaten Track ( V3 vs SF250)Part 2

The RIGHT way to counter Reyna's flash - Valorant Quick Tips

The RIGHT way to counter Reyna's flash - Valorant Quick Tips

How to Connect Router to Switch Simple Process in Hindi

How to Connect Router to Switch Simple Process in Hindi

How to SHUFFLE Cards Like a Magician! TOP 5!

How to SHUFFLE Cards Like a Magician! TOP 5!

Simply Red - Everytime We Say Goodbye

Simply Red - Everytime We Say Goodbye

DMC - D E F E C T | Lyrics Video

DMC - D E F E C T | Lyrics Video

Online Registration of establishment in EPFO

Online Registration of establishment in EPFO

Informatica Scenario Segregating Unique and Duplicate Rows:Best 2 approaches

Informatica Scenario Segregating Unique and Duplicate Rows:Best 2 approaches

Correct spelling for preceding.

Correct spelling for preceding.

🌊WATER SIGNS ✨ Your Intuition is Spot On ✨ Time to Make a Choice ✨ Authenticity Over Perfection

🌊WATER SIGNS ✨ Your Intuition is Spot On ✨ Time to Make a Choice ✨ Authenticity Over Perfection

Everyone should watch this Fishermen's video - Catch Hundreds Tons of Giant Bluefin Tuna Fish

Everyone should watch this Fishermen's video - Catch Hundreds Tons of Giant Bluefin Tuna Fish

Nirvana - Come As You Are

Nirvana - Come As You Are

The Wedding   Julie Rogers

The Wedding Julie Rogers

🔵Queen Catching and Marking!

🔵Queen Catching and Marking!

To a great extent मैं कॉफी हद तक तुम्हें जान चूका हूँ मेरी जान

To a great extent मैं कॉफी हद तक तुम्हें जान चूका हूँ मेरी जान

தேர்தலில் போட்டியிடும் 35 பேர் கொண்ட முதல் வேட்பாளர் பட்டியலை வெளியிட்டது நாம் தமிழர் கட்சி

தேர்தலில் போட்டியிடும் 35 பேர் கொண்ட முதல் வேட்பாளர் பட்டியலை வெளியிட்டது நாம் தமிழர் கட்சி

New and Inventive Ideas

New and Inventive Ideas

[ASMR] Tattoo Consultation & Trial (Soft Spoken)

[ASMR] Tattoo Consultation & Trial (Soft Spoken)

Hidden World | Bossa Jazzhop

Hidden World | Bossa Jazzhop

Όλα όσα πρέπει να ξέρετε για τις μετεγγραφές | Χρήστος Ταουσάνης

Όλα όσα πρέπει να ξέρετε για τις μετεγγραφές | Χρήστος Ταουσάνης

What are Direct (Hidden) fifths & Octaves (harmony)

What are Direct (Hidden) fifths & Octaves (harmony)

alanzoka jogando Folklore Hunter com cap, calango, vx e fall

alanzoka jogando Folklore Hunter com cap, calango, vx e fall

Feed and tend international

Feed and tend international

Happy Birthday Prompted Writing Podcast!

Happy Birthday Prompted Writing Podcast!

Increasing Guitar Speed With Correct Guitar Picking Technique And Alternate Picking

Increasing Guitar Speed With Correct Guitar Picking Technique And Alternate Picking

THE COST OF LOCKDOWNS WITH DR PATRICK PHILLIPS (TRAILER)

THE COST OF LOCKDOWNS WITH DR PATRICK PHILLIPS (TRAILER)

our FAMiLY TREE!!  Ready for Christmas routine with Adley & Niko! decorate inside our house xmas fun

our FAMiLY TREE!! Ready for Christmas routine with Adley & Niko! decorate inside our house xmas fun

Aluminium Foil Container Making Machine  M- 08360540277

Aluminium Foil Container Making Machine M- 08360540277

What Is the Power of a Hug? | Fun Science

What Is the Power of a Hug? | Fun Science

Demon Hunter - Raining Down

Demon Hunter - Raining Down

ASMR for those that are Hurting 💔 (4 MICS 4 EXTRA TINGLES)✨

ASMR for those that are Hurting 💔 (4 MICS 4 EXTRA TINGLES)✨

Traffic halts as Giant Anaconda Crosses Road in Brazil; Video Goes Viral || GoViral

Traffic halts as Giant Anaconda Crosses Road in Brazil; Video Goes Viral || GoViral

Go Off - Meaning and Examples (English Phrasal Verbs)

Go Off - Meaning and Examples (English Phrasal Verbs)

Benelli Imperiale 400 BS6 City Ride Review Should You Consider Buying? #Bikes@Dinos

Benelli Imperiale 400 BS6 City Ride Review Should You Consider Buying? #Bikes@Dinos

Top 10 Things Extremely Wicked, Shockingly Evil and Vile Got Factually Right And Wrong

Top 10 Things Extremely Wicked, Shockingly Evil and Vile Got Factually Right And Wrong

Tyga ft. Kylie Jenner - Stimulated (Official Video)

Tyga ft. Kylie Jenner - Stimulated (Official Video)

Through Different Eyes

Through Different Eyes

【4K HDR】这才是看世界的正确方式!

【4K HDR】这才是看世界的正确方式!

What does forty-seventh mean?

What does forty-seventh mean?