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| Will the positive detection of the express package infect people? |
On November 15, according to media reports, Zhongguancun Street in Beijing received a notification from the Haidian Center for Disease Control and Prevention that residents of Keyuan Community tested positive for a package of express items sent by Xilin Gol League in Inner Mongolia Autonomous Region
.
The details of the matter are like this
.
On October 31, the resident received a courier with a non-woven inner packaging, and the outer packaging will be discarded after unsealing
In fact, similar cases were recently discovered in Inner Mongolia, Heilongjiang, Liaoning and other places before the positive package of express delivery was detected in Beijing
.
For a while, public opinion was in an uproar, and the express delivery received half a month ago turned out to be positive
.
Is the virus alive or dead, how long can it survive on the surface of express delivery, and can it still infect people?
"There is a high probability that the outer surface of express packages from epidemic areas will carry the new coronavirus.
After all, people infected with the new coronavirus will excrete the virus through various channels
.
However, after long-distance and long-term transportation, the possibility of dead virus is higher.
Zhao Wei said that even if it is a dead virus, it still has nucleic acid, so the nucleic acid test will be positive
.
But because it is a dead virus, it is inactive and generally not contagious.
According to the Haidian District Center for Disease Control and Prevention, the detection of the non-woven bag inside the package is positive for the new coronavirus gene fragment, which can only prove that the package has been contaminated by the new coronavirus and whether the virus on the package is active and infectious.
It is impossible to draw conclusions based on gene fragment testing
.
As for how long the new coronavirus can survive in the environment? Zhao Wei explained that the new coronavirus is sensitive to high temperature and dryness.
Generally speaking, on the surface of printed matter and tissue paper, no active virus can be detected after 3 hours
.
On the surface of clothing, the virus can survive for 2 days, and on the surface of stainless steel, it can survive for 7 days
"Research shows that the new coronavirus is the most stable at 4°C, and most of the viruses are still alive after 14 days.
The
viable virus can still be detected after 7 days at 22°C, but it will be completely undetectable after 14 days
.
" Zhao Wei emphasized
"Therefore, after the express delivery from the epidemic area has been transported over a long distance, there is less possibility of live virus
.
" Zhao Wei said
In his opinion, what is more noteworthy is the goods from cold chain transportation
.
The new coronavirus attached to salmon can survive for at least 10 days at 4°C and 2 days at 25°C.
The titer of the virus continues to decrease with time under both temperature conditions
Zhao Wei suggested that the public should try not to buy cold-chain foods imported from epidemic areas, and try to reduce cold-chain foods that have been eaten raw.
Heat-processed foods are basically safe
.
The courier can remove the outer packaging and discard it in the trash bin in an outdoor environment.
If possible, try to wear a mask and disposable gloves to operate, and wash hands promptly after disposal
.
Focus on the new crown pneumonia epidemic
