As more and more people are infected with the new coronavirus, the questions that many people are considering are gradually changing from "what to do after being positive" to "what to do after turning negative". For example, will there be any residues of the new coronavirus on the original cosmetics and daily necessities? Especially lipstick, lipstick, toothbrush, cup, and personal items that have contact with the mouth, do they need to be replaced?
If you want to determine whether daily necessities need to be replaced after the "yang" passes, we must start with the time when virus survives on the surface of the object.
01
How long can different new coronavirus strains survive on the surface of objects?
As early as early 2020, a research team from the National Institute of Allergy and Infectious Diseases and Princeton University published an article in the New England Journal of China, studying the survival time when the new coronavirus leaves the human body, it spreads to the surface of various daily necessities through aerosol or droplets. The new coronavirus three years ago was still the original strain. This study shows that at experimental temperature, the original strain can survive in the air of for 3 hours, , 4-24 hours on the surface of paper items, 2-3 days on plastic and stainless steel, 2-3 days on , while on glass, for a longer time, , , for 9 days.
A article in the magazine "New England" reveals that The survival time of the new coronavirus primitive strain
So this year, will the time when the new coronavirus that has mutated so many times - Omickron strain survive on the surface of an object change?
Indeed, is a change in . From the original strain in early 2020 to the alpha strain, to the beta strain, gamma strain, delta strain , and finally to the current Omickron strain, as the new coronavirus continues to evolve, its spreadability is becoming stronger and stronger, which is related to the time they survive on the surface of various items. The popular Omickron strain today can survive in the environment for a long time, which also "contributes" to the rapid spread of the epidemic.
So how long is this "long time"?
At the beginning of this year, a study from Kyoto Medical University in Japan showed that Omickron can survive on the plastic surface for 193.5 hours, the alpha strain can survive for 191.3 hours, the beta strain, the delta strain and the gamma strain survived for 157 hours, 114 hours and 59 hours respectively, while the original strain three years ago only survived for 56 hours.
They also studied the ability of different new coronavirus strains to survive on human skin. The results showed that the Omickron strain survived the longest time on the skin, up to 21.1 hours, followed by the alpha strain (19.6 hours) and beta strain (19.1 hours), and finally the delta strain (16.8 hours), the gamma strain (11.1) and the original strain (8.6 hours).
That is to say, Omickron's survival time in the environment is indeed longer than the original strain , but it is still only a few hours or days.
02
The surface of porous objects has the worst vitality of the new coronavirus
Another article published in the journal Science Report also studied the survival time of the Omickron strain on smooth and porous surfaces such as stainless steel, glass, printing paper and facial tissues. It was found that Omickron had the highest survival rate on the glass surface, and even after 7 days, the surviving virus was found. On 100% cotton fabric, Omickron's survival rate will be greatly reduced within 4 hours, and there will be no live viruses detected after 24 hours.
Viral survival time on different surfaces
(A)Stainless steel, (B)Plastic, (C)Nitrile gloves , (D)Chemical-proof gloves, (E)N95 mask, (F)N100 mask, (G)HD polyethylene fiber and (H)Cotton
Although many scientists have studied the survival time of different virus strains on the surface of objects, the reasons affecting the survival of each strain in the environment are still unclear. One conjecture indicates that the porous nature of cotton fabrics increases the surface area of inoculation droplet adsorption , may enhance the degradation of viruses , thereby reduces virus vitality .
03
So, will viruses be infected with contact with the surface of an object?
If you just changed from "yang" to "yin" today, you invite a wave of friends who have not yet been infected with Omickron to celebrate at your home. In order to prevent your friends from getting infected, would you first choose to open windows to ventilate or disinfect the surface of all items in your home?
In fact, does not have to wipe and disinfect the daily necessities at home . Although the Omickron strain will survive on the surface of the object for a longer time, people are unlikely to infect Omickron by contacting the surface of the object. Aerosols and droplets are the more important ways of transmission.
For example, if the virus spreads to your friend's hands through aerosols or droplets, and he happens to rub his eyes again, then the new coronavirus may enter the human body from his eye mucosa, causing him to get into it.
Therefore, when you invite friends to your house to participate in the "gold-turning party", in order to prevent your friends from becoming "yang", it is better to open windows and ventilate !
04
Will the virus on daily necessities cause us to be infected with "repositivity"?
We can assume that you are suffering from the flu rather than the new crown. After the flu recovers, will you throw away your lipstick, toothbrush and other daily necessities that may have residual flu virus? Of course not!
The same is true. When your new coronavirus infection is cured, does not have to change daily necessities . On the one hand, I just mentioned that the survival time of viruses on the surface of objects in the experimental environment should not exceed 10 days.
On the other hand, even if the virus survives on the surface of an object for a few weeks and still infects the human body again, it won’t be so. Because after infection, the human body will produce specific antibodies against the corresponding strains and variants. When the human body comes into contact with the same virus again, the immune cell present in the body can quickly produce antibodies to clear the virus.
A study in October 2021 showed that reinfection may be re-infected as soon as 3 months after infection with the new coronavirus. This kind of "re-positive" is unlikely to be re-infected by the virus on your own daily necessities. If it is "re-positive" in the short term, it must be that it is accidentally infected with another variant of the virus. This is the same as having several colds in a winter.
So, after "sunlight", your lipstick, lipstick, toothbrush, and cup can be used! Not to mention other daily necessities, they don’t need to be replaced, and there is no need to worry too much.
(Source: People's Daily )
Editor: Han Luying
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