Sewing
own face masks (credit to NBC Connecticut)
We
might all knew that many hospitals are facing shortage of protective
gears (health supplies) for health care workers or Covid-19 patients
or general public across America.
Some
of important supplies are:
-
testing kits
-
eye protection
-
gloves
-
gown
-
face masks (surgical and N95
type respirator)
In
case of face masks, these disposable items which cost less than 75
cents are ran out as well. Un-believable for rich country such as
America.
One
hospital may need 5,000 to 15,000 face masks: surgical face masks to
patients and N95 respirators for medical workers.
Designs
of homemade face masks (credit to Dr Monique Tello)
Luckily,
sewing people (mom, nanny and kids) step up to supply the homemade
face masks to hospital in many states.
You
may ask a question: could homemade masks protect us from Covid-19?
Before
answer this question, I posted article: Can Face Masks Contain Wuhan Coronavirus?
The
commercial face masks, I quote from my own post: “The surgical mask
is effective to block big droplets, but we may inhale very small
droplets from the sides of filters.”
Moreover,
“N95 respirator is able to block from 95% to 99% airborne
pathogens, germs or virus. It is good for health care workers who
handle Coronavirus patients (suspected or infected).”
The
homemade face mask effectiveness is depend very much on the
materials. The following material effectiveness to block 0.02 micron
particles (less than Corona virus size):
-
scarf is 49% effective
-
silk is 54% effective
-
linen is 62% effective
-
cotton blend is 70% effective
-
vacuum cleaner bag is 86% effective.
Thus,
at
least, homemade
face masks are suitable to halt spreading of droplets from infected
patients or preventing dispersion of coughing particles.