How long can COVID-19 survive in the air? How to protect yourself properly?
What do you care about most now? I am afraid everyone is most concerned about how to prevent COVID-19. To be honest, as an ordinary person, our knowledge of this virus is very limited, we can only listen to the recommendations of medical experts. Experts tell us that this virus causes a new type of pneumonia, and one way to prevent it is to wear a mask.
Wearing a mask means that COVID-19 can be spread by air, and wearing a mask can effectively isolate viruses in the air. So, how long can COVID-19 survive in the air? It is about prevention effect, knowing and benefiting early.
Viruses and bacteria are the enemy of our health, but viruses and bacteria are very different. The biggest difference is that bacteria have autonomous self-reproduction capabilities, but viruses do not. Once the virus leaves the host, it is easy to lose activity and eventually lose its harmfulness. That is to say, the virus needs a carrier to spread. Once it is separated from the original host, if it does not find a new host, it will lose its ability to infect within a certain period of time.
Knowing this, let's look at how long COVID-19 can escape from the patient and survive in the air?
As a general rule, viruses with capsules are less able to fight the environment than viruses without capsules. This is because when an enveloped virus infects a host, it depends on the active ingredients in its capsule, but this capsule is very vulnerable to damage by the natural environment, which reduces the probability of viral infection.
Fortunately, the new coronavirus is an enveloped virus, that is, it does not survive in the air for long after leaving the host. Of course, because it is a new virus, there is currently no very accurate data to explain its specific survival time. However, we can refer to the survival time of other enveloped viruses in the air. Under normal circumstances, the enveloped virus survives in dry air for less than 2 hours, and survives in humid air for a longer period of time. Basically, COVID-19 can only survive for about 2 hours in dry air.
At the same time, the study also found that COVID-19 survived on woolen clothing for a shorter period of time. This is because woolen clothes have better water absorption, are easier to keep dry, and are more detrimental to COVID-19's survival.
Gao Fu, director of the Chinese Center for Disease Control and Prevention and an academician of the Chinese Academy of Sciences, believes that COVID-19 is an enveloped virus and has poor adaptability to the in vitro environment and will die in less than 30 minutes. Of course, this is also a speculation by experts, without scientific experiments and accurate data as support. Of course, this is the survival time of COVID-19 in the air, and in actual life, the virus will not float in the air forever, most will still be attached to the surface of the object. So, how long can the surface attached to the object survive?
For this problem, there is currently no specific data for COVID-19, because there is not enough time to conduct sufficient research. You can also refer to the survival time of similar viruses.
Under normal circumstances, the same type of enveloped virus, such as SARS, can survive for a maximum of 6 hours in a dry state and a maximum of 24 hours in a wet state. They are all capsular structures, and it is estimated that the new coronaviruses are similar. Give the experts some time, I believe they will know soon.
At the same time, let me tell you some of the characteristics of COVID-19, it can also be said that it is its weakness, so it is more conducive to its prevention.
COVID-19 is afraid of high temperature, as long as the temperature reaches 56 degrees, it will lose its activity and no harm in 30 minutes; secondly, COVID-19 is afraid of disinfectants, generally it can be killed with 75% medical alcohol Of course, 84 disinfectants and some chlorine-containing disinfectants are possible. In addition, COVID-19 is afraid of ultraviolet rays, and it can also be killed after ultraviolet irradiation.
Knowing the survival time of COVID-19 after leaving the patient and some of its characteristics are very helpful to improve the accuracy and effectiveness of our prevention and can affect our prevention effect. Therefore, it is recommended that you take the following measures:
Don't go to crowded places. In view of the fact that COVID-19 can survive for a period of time after leaving the host, we want to avoid infection and play a good preventive effect. It is best not to go to hospitals, squares, stations, KTV and other places where people are dense. People with COVID-19 will have cold-like symptoms, such as sneezing, coughing, etc., they will spread the virus into the air.
Once you inhale the viruses during the time they survive, you will become the next infector. Of course, it includes items that touch people-intensive places, such as elevator switches, etc., so that when you touch your mouth and nose with your hand, the virus will take advantage of the opportunity.
If you have to go to these places, you must wear a mask. Because the mask can filter the air, it isolates the virus to the maximum extent.
Use medical alcohol for disinfection. Although COVID-19 is coming, the society cannot but work, and many people must go to work. In this case, in addition to wearing a mask, some key parts must be disinfected. For individuals, after contact with the outside world, they must wash their hands frequently. After entering some sensitive areas, you must not only wash your hands, but also disinfect your hands, masks, coats, etc. with medical alcohol.
Home is more ventilated. Many people think that the virus is so powerful, you should close the doors and windows at home to prevent the virus in the air from floating to your home. Actually this kind of view is wrong. In a natural state, the virus is easily diluted and will not float to other people's homes at all. Therefore, in order to keep the air fresh, usually open more windows to ventilate, which is more beneficial to health.