Why masks with valves do not slow the spread (1 of 2)
This video, created using a schlieren imaging system, shows airflow dynamics when wearing an N95 mask with an exhalation valve (left) and without an exhalation valve. The valve is designed to allow air to escape unfiltered. Masks with valves do not slow the spread of COVID and should not be worn for that purpose, according to the CDC. Read more about this video: Credit: Matthew Staymates/NIST.
1 view
22
0
10 hours ago 00:03:24 1
Falling In Reverse - “Watch The World Burn“
11 hours ago 00:04:31 1
Slipknot - The Dying Song (Time To Sing)
2 days ago 00:13:33 1
Globalists’ Master Plan: Why BRICS Won’t Save Us from the New World Order
2 days ago 00:20:36 1
FREE AI tool for photographers, or why MidJourney SUCKS!
2 days ago 04:04:06 1
Why are these INVENTIONS little known? 59 SIMPLE HOMEMADE TOOLS
3 days ago 00:03:26 1
Overtime - “Divided We Fall“ feat. Caleb Jacobson
4 days ago 00:20:20 1
CHOSEN ONES, YOUR ENERGY IS TOO PURE! GOD IS SEVERING TIES WITH THE FAKE ONES!!🙏
5 days ago 00:02:39 1
SKEPTA, GHETTS - I SEE THREE
6 days ago 00:03:01 1
False Confidence - Noah Kahan l Choreography by Sean Lew l #BABE2019 l Sean & Kaycee
7 days ago 00:15:41 1
🔔The Truth Is Out, the Masks Have Fallen: They See the Dark PersonYou Escaped