To conduct the test, the scientists had four different testers stand in a black box which contained a laser and a cellphone camera. The individuals then had to face the laser and say the words 'Stay healthy, people' five times while wearing the masks. The camera then recorded the number of droplets set had been released through the masks and an algorithm determined how many droplets had actually managed to make it into the air.
Haven’t I seen this article about a week ago? Not new news
They are all bad for your health
Made in china ! Go figure 😆💙🏴💙😆
Good morning Vietnam ! Now !? Afer months, millions of died and victims !
I don't wear masks
I only wear a mask to get into a shop or on transport - I couldn't give a xxxx how protective it is. I've worn the same disposable one over-and-over again since rule was introduced.
Your false narrative is not helpful.
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