戴與不戴口罩差超多! 實驗檢證「病毒傳播狀況」一個噴嚏比咳嗽更猛
2020年07月02日疫情期間戴口罩是頭等大事,但最近關於戴口罩的爭議越來越多。有人質疑戴口罩是否有效果,為此生物學家Rich Davis做了一個簡單的實驗,向大家展示「戴口罩 vs 不戴」的差別。看完後你可能再也不敢掉以輕心了~
▼Rich將裝有瓊脂培養物的盒子放到面前,分別以「戴口罩」和「不戴口罩」的方式對著盒子噴嚏、唱歌、聊天和咳嗽,看看有什麼差別。
What does a mask do? Blocks respiratory droplets coming from your mouth and throat.
— Rich Davis, PhD, D(ABMM), MLS🧫🦠 (@richdavisphd) June 26, 2020
Two simple demos:
First, I sneezed, sang, talked & coughed toward an agar culture plate with or without a mask. Bacteria colonies show where droplets landed. A mask blocks virtually all of them. pic.twitter.com/ETUD9DFmgU
▼結果顯示,戴口罩時傳播出去的病毒、細菌非常少,沒戴口罩時超級多!在不戴口罩的情況下,噴嚏傳播的病毒、細菌最多,其次是咳嗽,唱歌和聊天傳播的病毒、細菌差不多。
▼Rich還做了另一個很有意義的實驗,向人們展示「保持社交距離」和「不保持社交距離」的情況下病毒的傳播情況。他分別以「戴口罩」和「不戴口罩」的方式對前方咳嗽15秒,看看瓊脂培養物的情況。
What about keeping your distance?
— Rich Davis, PhD, D(ABMM), MLS🧫🦠 (@richdavisphd) June 26, 2020
Second demo: I set open bacteria culture plates 2, 4 and 6 feet away and coughed (hard) for ~15s. I repeated this without a mask.
As seen by number of bacteria colonies, droplets mostly landed <6 ft, but a mask blocked nearly all of them. pic.twitter.com/8wDdvIHHMa
▼結果顯示,戴口罩能夠大大降低病毒的傳播。不戴口罩的話,至少要保持6公尺才能減少病毒傳播。
I'm aware that this simple (n=1) demo isn't how you culture viruses or model spread of SARS-CoV-2.
— Rich Davis, PhD, D(ABMM), MLS🧫🦠 (@richdavisphd) June 26, 2020
But colonies of normal bacteria from my mouth/throat show the spread of large respiratory droplets, like the kind we think mostly spread #COVID19, and how a mask can block them! pic.twitter.com/16azsiIbZd
雖然戴口罩真的很麻煩,也不太舒服,但現在疫情還沒有過去,出門戴口罩是必須的,大家還是再忍耐一段時間吧~
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來源:Twitter