The U.S. Centers for Disease Control and Prevention (CDC) recently changed its view of the use of masks during the COVID-19 pandemic,media BGR reported. The official advice is that masks made from ordinary household items should be used instead of hoarding medical surgical masks and N95 masks. The CDC says these should be given priority to those who fight the new coronavirus on the front line, including doctors, nurses, first responders and others who often deal with patients.
Media pointed out that while the CDC recommends that Americans wear cloth masks made from ordinary household materials to slow the spread of the new coronavirus, that doesn’t mean they can relax their guard. First, that physical barrier is not 100% guaranteed that it will not be infected with the virus. Second, people should not stop keeping their designdistances and proper hygiene practices because they wear masks. To further reinforce this view, two different studies recently analyzed the survival of SARS-CoV-2 virus. One study found traces of microbes on masks for up to seven days.
A study in mid-March found that the new coronavirus could survive up to three hours in the air and up to three days in plastic and stainless steel. Then, the CDC found traces of the virus on one of the cruise ships used to house isolated COVID-19 patients, and 17 days after they left, the CDC found traces of the virus on one of the cruise ships. This does not mean that the virus will become infected after such a long time, but this finding adds to why SARS-CoV-2 is so dangerous.
In early April, researchers analyzed the stability of viruses in different environments, according to a new study published in The Lancet by the University of Hong Kong. “On the 7th day, the outer layer of the surgical mask may still have detectable infectious viruses,” the study said. This detail alone should remind you that after each use, be sure to always discard the disposable mask and wash the home’s homemade reusable mask. In addition, when using the mask must avoid contact with the mask, avoid the use of the mask in the process of touching their face, this is critical.
The following are the other findings in the study.
The virus is very stable at a temperature of 4 degrees C/39.2 degrees F, but is sensitive to high temperatures.
The virus inactivates ininactivation in just 5 minutes at 70 c/158 degrees F.
Printing and paper: The virus died after 3 hours (22 degrees C/71.6 degrees F and 65% humidity).
Wood and cloth: The virus died after 2 days (22 degrees C/71.6 degrees F and 65% humidity).
Glass and paper money: The virus died after 4 days (22 C/71.6 degrees F and 65% humidity).
Stainless steel and plastic: the virus died after 7 days (22 c/71.6 degrees F and 65% humidity).
The study found that the virus was very stable in the larger pH range (3-10) but died after disinfection.
In other words, it is necessary to keep the ordinary surface clean, to wash the clothes you wear out, and to maintain proper hygiene. Also, wash your hands with soap for at least 20 seconds after handling items brought in from the outside. On the other hand, exposure to high temperatures kills the virus, which is a key detail for food. The heated food has no signs of virus.
A similar study by the CDC focused on the sensitivity of viruses to heating and ultraviolet radiation.
The results showed that SARS coronavirus esfactors under test conditions could survive at least 96 hours in serum, 1:20 diluted sputum and feces, and at least 72 hours in urine, which was less contagious. The survivability of 8 different materials on surfaces and water was comparable, showing reduced infectiousness after exposure 72 to 96 hours. The virus remained stable for at least 2 hours at a room temperature of .4C/39.2F, room temperature of 20C/68F, and 37C/98.6F, while there was no significant change in infection, but at 56o After 90, 60 and 30 minutes of exposure at C/132.8 degrees F, s67C/152.6 degrees F, and s/75degrees C/167 degrees F, respectively, the virus is transformed into non-infection. After 60 minutes of UV exposure, non-infectious conversion is applied after exposure of 90-60-60-60 and .75degrees/132.8 degrees F, respectively, under the conditions of 75 degrees C/167 degrees F and .67degrees/152.6 degrees F, respectively.