Basic reproduction number - Wikipedia In epidemiology, the basic reproduction number of an infection can be thought of as the expected number of cases directly generated by one case in a population where all individuals are susceptible to infection.
The basic reproduction number is not to be confused with the effective reproduction number R which is the number of cases generated in the current state of a population, which does not have to be the uninfected state. By definition R0 cannot be modified through vaccination campaigns.
R0 is not a biological constant for a pathogen as it is also affected by other factors such as environmental conditions and the behaviour of the infected population.
Furthermore R0 values are usually estimated from mathematical models, and the estimated values are dependent on the model used and values of other parameters.
Thus values given in the literature make only sense in the given context and it is recommended not to use obsolete values or compare values based on different models.[13] R0 does not by itself give an estimate of how fast an infection spreads in the population.
In epidemiology, the basic reproduction number of an infection can be thought of as the expected number of cases directly generated by one case in a population where all individuals are susceptible to infection.
在一次疫情中，R0 不會改變，但是傳染狀況會被氣候、人為介入等因素影響。
定義是疫情中，傳染病實際上的傳播狀況
有效感染數應該才是他想表達的東西，他把這個和基本感染數搞混惹
Furthermore R0 values are usually estimated from mathematical models, and the estimated values are dependent on the model used and values of other parameters.
>>R0 不會改變
上面文章說到R0其實是一個平均數，所以如果我們把不同區域分開來看，各地的R0也應該會不同?
因為 R0 只是某次疫情時疾病本身決定的，不受其他因素影響
或是說，不同脈絡下，（估計而得的）R0 本來就會不一樣
不過要強調，我不是專業的啊！