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新冠病毒:在物体表面有多久的存活时间?

冠状病毒是一种病毒,广泛存在于人类和动物之间,可引起(或协助引起)一系列疾病,包括流感、胃肠炎、呼吸道疾病等。2018年,世界卫生组织(WHO)称冠状病毒为“世界上影响最大的病原体之一”。

目前尚不清楚新冠病毒对物体表面的存活时间。研究表明,病毒可能会在物体表面存活数小时,但这取决于许多因素,如物体的材料、温度和湿度。

在实验室环境下,SARS-CoV(新冠病毒的前身)可以在低温(4℃)下存活18小时,在室温(21℃)下存活2小时,在高温(37℃)下存活不足1小时。但是,这些是在实验室条件下进行的实验,并不能完全代表真实环境。

气溶胶是病毒在室内环境中传播的主要方式,因此,空气流速对病毒的存活时间有很大影响。研究表明,在室内环境中,病毒可能会在空气流速较快(如风扇或空调开启时)的情况下存活较长时间,但在空气流速较慢(如室内没有通风设备时)的情况下存活较短时间。

在实际情况下,病毒可能会在多种材料上存活,如塑料、金属、玻璃、木材、毛细管和纸张等。研究发现,病毒更倾向于在比较干燥的表面(如塑料和金属)上存活更长时间,而在比较潮湿的表面(如纸张)上存活的时间相对较短。

温度也会影响病毒在物体上的存活时间。研究表明,在实际情况下,在高温(如60℃)条件下消毒接触表面可以杀死病毒,但是在室温或低温条件下杀死病毒的可能性较小。

湿度对病毒的存活时间也有影响。研究表明,在实际情况下,在湿度较高(如80%)的环境下,病毒的存活时间相对较短,但在湿度较低(如50%)的环境下,病毒的存活时间相对较长。

总之,新冠病毒在物体表面的存活时间取决于许多因素,因此目前尚不清楚具体存活时间。为了防止病毒传播,建议人们勤洗手,尽量避免接触可能已被污染的表面。

Coronaviruses are viruses that exist widely between humans and animals, and can cause (or assist in causing) a range of diseases, including influenza, gastroenteritis, respiratory diseases, etc. In 2018, the World Health Organization (WHO) called coronaviruses “one of the world’s most important pathogens”.

It is currently unclear how long the new coronavirus can survive on surfaces. Studies have shown that the virus can survive on surfaces for several hours, but this depends on many factors such as the material, temperature, and humidity of the object.

In laboratory conditions, SARS-CoV (the predecessor of the new coronavirus) can survive for 18 hours at low temperature (4℃), for 2 hours at room temperature (21℃), and for less than 1 hour at high temperature (37℃). However, these are experiments conducted under laboratory conditions, and cannot completely represent the real environment.

Aerosols are the main way in which the virus spreads in indoor environments, so the air flow rate has a great impact on the survival time of the virus. Studies have shown that in indoor environments, the virus can survive longer in situations where the air flow rate is faster (such as when the fan or air conditioner is turned on), but survive for shorter periods of time when the air flow rate is slower (such as when there is no ventilation equipment in the room).

In practice, the virus can survive on a variety of materials, such as plastics, metals, glass, wood, capillaries, and paper. The study found that the virus is more likely to survive for a longer period of time on drier surfaces (such as plastic and metal), while the survival time is relatively shorter on wetter surfaces (such as paper).

Temperature also affects the survival time of the virus on the object. Studies have shown that in practice, the virus can be killed by disinfecting the contact surface at high temperature (such as 60℃), but the likelihood of killing the virus at room temperature or low temperature is much lower.

Humidity also affects the survival time of the virus. Studies have shown

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