24Drs.com - 國際厚生健康園區
  • 營養素小幫手讓你輕鬆認識營養素
  • 加入24drs粉絲專頁
新聞中心 疾病資訊 醫療服務
加入會員 回首頁 需要協助嗎?..聯絡我們的客服信箱
國內醫療活動
臺中市中西區衛生所,辦理免費癌症篩檢
「髓」心所「遇」講座
2017癌症新藥更靠近-癌症新藥可近性論壇台中場
攝護腺肥大用藥指導
世界肝炎日-三總肝炎宣導暨衛教講座
智慧病人肺活 99 醫學講座 (台中場)
更多...
醫療保健集錦
「毒」留高崗上 環團籲戶外品牌淘汰PFCs
吃健康也吃出土地情味 南方食農教育願景促立法 (下)
吃健康也吃出土地情味 南方食農教育願景促立法(上)
農夫市集園遊會 尋找台灣糧食良方
翻轉毒鳥宿命 崁頂「老鷹紅豆」力拼友善耕作(下)
翻轉毒鳥宿命 崁頂「老鷹紅豆」力拼友善耕作(上)
更多...
國內醫療新聞
報您防中暑五撇步 趁暑假運動,舒服享受夏日排汗
專治難病的第一名免疫科醫師
7歲以下幼兒享有7次健檢服務 只需掛號費,定期健康檢查,守護寶貝健康
新增新生兒腸病毒併發重症死亡,嬰幼兒為重症高危險群,家長請留意
流感疫情逐漸趨緩,公費流感抗病毒藥劑擴大使用條件適用至8月15日截止
4成以上爸爸腰圍過粗 每天10分鐘,父親節用實際行動關心爸爸健康!
更多...
百病保健補給站
慢性阻塞性肺病
老而彌健 健康老化
注意力不足過動症
泌尿道感染
中東呼吸症候群冠狀病毒感染症
健康數字123
更多...
WebMD 大眾醫療新聞
運動別帶手機
辣椒可以延長壽命
坐越久 老越快
咖啡也能提升心臟健康?
忙碌的心可能有助於對抗失智症
空氣污染會增加阿茲海默氏症的風險?
更多...
WebMD 專業醫療新聞
腦中的鐵質或許可以預測阿茲海默氏症的病程
在之前已有診斷的成人中 許多並未確認氣喘
魚油、阿斯匹靈無法降低透析時的AVF失敗風險
在齋戒月期間管控巴金森氏症
小型研究指出飲食可改善IBD症狀
單靠篩檢與治療無法預防第二型糖尿病
更多...
★哈斯比辛新聞
3款中藥茶飲 喝出好眼力
冬季易肩痛加劇 恐是肌腱退化性斷裂
水喝多了也會頭暈 健康飲水有原則
不抽菸少煮食 莫名得肺癌 基因是關鍵
皮膚癢、眼睛腫 藥物過敏啦! 
飯前吃或飯後吃 照藥袋指示就對了
更多...
我們的榮耀
一、凡經行政院衛生署「健康資訊網站評獎活動」獲評為「優良健康資訊網站」者,並於93-94年連續獲選優良健康資訊網,得於獲獎網站首頁張貼「93-95年優良健康資訊網站標章」。
二、本標章係行政院衛生署頒予「93-95年度健康資訊網站評獎活動」獲獎網站之網路辨識標記,旨在表揚與彰顯獲獎網站優異之健康資訊內容與網站服務,並提供民眾在搜尋健康資訊時有所依循。然因健康資訊的日新月異,故衛生署無法對張貼本標章之網站所提供資訊之正確性與完整性時時刻刻負責。因此對於網站所刊載的內容,以及衍生的法律訴訟問題,概由網站經營者自行負責;而民眾對於網站內醫療、衛生保健等相關資訊,仍應與專業人員當面討論,以保障自身權益。
三、本標章之著作權屬行政院衛生署所有,主要提供「93-95年度健康資訊網站評獎活動」獲獎網站張貼於網站供民眾辨識之用,非經本署同意,任何網站不得私自下載與使用。
美國WebMD大眾醫療新聞
中文版

Can a Mask Protect You from SARS?

April 29, 2003 -- The images of mask-covered men, women, and children have been linked with SARS (severe acute respiratory syndrome) since the outbreak began. Sales of the paper masks have soared in areas hardest hit by SARS as people try to protect themselves from an unknown enemy. But how much protection can a simple mask offer from SARS?

Despite their popularity in Asia, experts say standard surgical masks -- the inexpensive square masks that tie behind your head -- are probably more effective in preventing people with SARS from spreading the disease than protecting healthy people from becoming infected.

CDC director Julie Gerberding, MD, says surgical masks are useful in filtering out relatively large particles of moist materials that you cough up or sneeze, which reduces the likelihood of passing SARS to another person.

"That's the reason why we recommend that those masks be used for patients with SARS because it contains their secretions and prevents them from being disseminated in the environment," says Gerberding.

Infectious disease expert Jon Temte, MD, PhD, of the University of Wisconsin says the pictures of people in Beijing and Hong Kong wearing surgical masks remind him of the influenza pandemic of 1918.

"I remember looking at old photos from the 1918 influenza pandemic and seeing people wearing masks everywhere," says Temte. "But that was never shown to be effective for preventing the spread of influenza."

Temte says it's really to early to know whether masks are an effective way to protect against SARS. Researchers simply don't know enough about the virus and how it spreads.

"On the flip side, there is probably not a whole lot of harm in it," Temte tells WebMD. "Any sort of barrier will reduce likelihood of droplet transmission."

Health officials at the World Health Organization and CDC believe SARS is spread primarily by close contact with droplets from an infected person.

"So if we're looking at a viral transfer on the basis of coughing up small droplets, when that droplet travels the distance between the person and the unlucky recipient and lands on fertile ground, you have transmission," says Temte.

Wearing a mask may protect people from inhaling these droplets and becoming infected, but the masks usually don't fit snugly and can allow droplets to enter the mouth or nose from the edges of the mask.

Although droplet transmission through close, personal contact with an infected individual is believed to be the primary mode of transmission of SARS, health officials have not ruled out the possibility that tiny particles of the SARS coronavirus may also spread the disease through the air. If such transmission is possible, some of these tiny virus particles may pass through a simple surgical mask or enter through an air gap.

Surgical masks also provide no protection for the eyes, and some types of virus particles can enter the body through the eyes as well as the mouth and nose.

In addition, some types of coronaviruses are known to survive on objects for several hours, which means it's possible that person with SARS person could sneeze and infect an object like a door knob that is later touched by someone who then rubs their eyes, nose, or mouth and becomes infected in that manner.

For protecting people from SARS infection, the CDC recommends that healthcare providers who care for SARS patients wear a much more efficient mask known as an N95 respirator. This type of mask is certified by the National Institute of Occupational Safety and Health (NIOSH) as being effective at filtering out at least 95% of airborne particles of a particular size.

There are also N99 and N100 masks that are even more efficient, but N95 masks are considered the standard for preventing infection from most known viruses.

But for these masks to work, they must be properly fitted to make sure there are no gaps between the mask and the skin. The mask is made of a thicker material than regular surgical masks and, when properly fitted, does not allow air to flow outside the mask.

Gerberding says N95 masks are only recommended for healthcare workers caring for SARS patients because they are at greatest risk of becoming infected. In fact, the majority of initial SARS cases were among doctors, nurses, and medical students who cared for the first round of SARS patients and did not wear such protection. Since infection control measures such as wearing N95 masks were implemented, the rate of SARS spread to healthcare workers has been drastically reduced.

"We don't recommend N95 masks for the general public. We don't recommend N95 masks for patients," says Gerberding. "We are recommending surgical masks for patients if they're well enough to wear one, and we're using those N95 masks in the healthcare environment in hospitals where we've got sick patients most likely to be aerosolizing relatively high concentrations of infectious material."

To reduce the risk of SARS transmission in the general public, the CDC recommends following good hygiene practices, such as frequent hand washing and use of alcohol-based rubs, and avoiding areas where SARS is known to have been spread.


SOURCES: CDC telebriefing, April 22. World Health Organization. Jon Temte, MD, PhD, associate professor at the University of Wisconsin in the department of family medicine.

WebMD Medical News
by Jennifer Warner
Reviewed By Brunilda Nazario, MD
Last Modified: 2003/5/5 上午 09:51:00

回 WebMD 大眾醫療活動 回 WebMD 大眾醫療新聞