R number
noun [ C ] uk/ˈɑː ˌnʌm.bər/ us/ˈɑːr ˌnʌm.bɚ/ (also R rate, /ˈɑː ˌreɪt/ /ˈɑːr ˌreɪt/)
传染率（reproduction number的缩写)
short for reproduction number: the average number of people that one person with a particular disease infects
An R number of 1 means that on average every person who is infected will infect 1 other person. 传染率为1表示平均每个患者会传染给另一个人。
Recent data has suggested that the R number in south-west England may be as high as 1.1. 最近的数据显示英格兰西南部的传染率高于1.1。
- More examples
- The R number for measles is around 15.
- The R number is a key measure of how fast coronavirus is spreading.
- Extra care needs to be taken when interpreting R numbers in regions where cases have fallen to low levels and transmission is highly variable.