如何衡量傳播性?
這里衡量的是病毒的繁殖率,有時(shí)叫做R.這指的是每個(gè)攜帶病毒的人會感染的其他的人平均數(shù)量.如果R大于一,則表明病毒在傳播.如果小于一,病毒在慢慢消亡. 殖繁數(shù)會受很多因素影響:病毒生物學(xué),人群免疫力,一些隔離措施,關(guān)閉學(xué)校,施行限制,以及搞病毒治療和疫苗.
同樣的,豬流感的繁殖數(shù)還是未知,雖然很明顯已超過了一.流行病學(xué)家們正對未來幾天和幾周作出評價(jià),對這次疫 情的可能趨向會有更好的了解.
How is transmissibility measured?
The measure here is the reproduction number, sometimes known as R. This is the average number of people that each person with the virus will infect. If R is greater than one, then the virus is spreading. If it is below one, then it is starting to peter out. The reproduction number can be affected by many factors: the biology of the virus, the level of immunity in the population, containment measures such as isolation, school closures and travel restrictions, and the use of antiviral treatments and vaccines.
Again, the reproduction number for swine flu remains unknown, though it is clearly above one. As epidemiologists establish its value over the coming days and weeks, they will develop a much better idea of the likely course of the pandemic.
這里衡量的是病毒的繁殖率,有時(shí)叫做R.這指的是每個(gè)攜帶病毒的人會感染的其他的人平均數(shù)量.如果R大于一,則表明病毒在傳播.如果小于一,病毒在慢慢消亡. 殖繁數(shù)會受很多因素影響:病毒生物學(xué),人群免疫力,一些隔離措施,關(guān)閉學(xué)校,施行限制,以及搞病毒治療和疫苗.
同樣的,豬流感的繁殖數(shù)還是未知,雖然很明顯已超過了一.流行病學(xué)家們正對未來幾天和幾周作出評價(jià),對這次疫 情的可能趨向會有更好的了解.
How is transmissibility measured?
The measure here is the reproduction number, sometimes known as R. This is the average number of people that each person with the virus will infect. If R is greater than one, then the virus is spreading. If it is below one, then it is starting to peter out. The reproduction number can be affected by many factors: the biology of the virus, the level of immunity in the population, containment measures such as isolation, school closures and travel restrictions, and the use of antiviral treatments and vaccines.
Again, the reproduction number for swine flu remains unknown, though it is clearly above one. As epidemiologists establish its value over the coming days and weeks, they will develop a much better idea of the likely course of the pandemic.