尼羅河水天上來

https://big5.backchina.com/?335112

CDC口罩政策從頭到尾就是一個國際笑話

作者：尼羅河水天上來於 2020-4-4 09:48 發表於最熱鬧的華人社交網路--貝殼村

作者分類:健康凈土|通用分類:熱點雜談

美國新冠疫情已經進入爆發階段，才承認潛伏期傳染和無癥狀傳播的存在，真的好意思
說是最近才知道的。

即使是最終放棄了沒病不必戴口罩的愚蠢決定，還是要為自己的愚蠢辯護，說口罩並沒
有給戴口罩的人提供很多保護，而是幫助不知道自己感染病毒的人把病毒傳播給他人。

國際笑話。

「We now know from recent studies that a significant portion of individuals
with coronavirus lack symptoms (「asymptomatic」) and that even those who
eventually develop symptoms (「pre-symptomatic」) can transmit the virus to
others before showing symptoms,」 the guidance states.

「CDC recommends wearing cloth face coverings in public settings where other
social distancing measures are difficult to maintain (e.g., grocery stores
and pharmacies) especially in areas of significant community-based
transmission.」
The guidance makes clear that wearing face coverings or cloth masks is an
additional public health measure to prevent the spread of the virus, not a
substitute for social distancing. Social distancing of at least six feet is
still recommended even when wearing a mask. Guidance and internal memos from
CDC emphasize that a cloth facial mask is intended not so much to protect
the wearer but to help prevent people who do not know they are infected from
spreading of the virus to others.

這就是正式公告了。不是保護自己而是保護他人的。

face cover when around others
You could spread COVID-19 to others even if you do not feel sick.
Everyone should wear a cloth face cover when they have to go out in public,
for example to the grocery store or to pick up other necessities.
Cloth face coverings should not be placed on young children under age 2,
anyone who has trouble breathing, or is unconscious, incapacitated or
otherwise unable to remove the mask without assistance.
The cloth face cover is meant to protect other people in case you are
infected.
Do NOT use a facemask meant for a healthcare worker.
Continue to keep about 6 feet between yourself and others. The cloth face
cover is not a substitute for social distancing.

作為一個負責任的專業機構，CDC起碼應該告訴人民用什麼材料，作多大的口罩才有效
果吧。起碼拿出一點濾過率的數據給人民看看吧。

尼羅河再次公告：

用裡外兩層軟布(舊T恤衫布即可)把兩張廚房用紙巾包在中間，四周用訂書釘固定。四
個角用小號夾子連接上普通橡皮筋。一個口罩就做好了。最後沿中線對摺，在上下沿用
訂書釘斜釘一針，保護效果更好。這樣的口罩可以濾過33% 0.3微米的顆粒，75% 2.5
微米的顆粒。與只能濾過90% 5 微米的外科口罩相比毫不遜色。