Infections
- Reproduction number

Reproduction number

The reproduction number (R) shows how fast the virus is spreading. The number shows how many people are infected on average by someone who is infected with the corona virus. That is why it is important to keep an eye on the R. If the R is below 1, the number of infected people decreases.

Last values obtained on Tuesday, 18 January. Is updated twice per week.

Source: RIVM

More information and data files in the 'Explanation of the data presented'

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Reproduction number

1.16

0.25 lower than the value of 30 December

Number of people infected by one infectious person. The reproduction number is a calculation and is updated every Tuesday and Friday. The reproduction number is two weeks old, because a reliable calculation of the reproduction number can be made after 14 days.

The reproduction number shows how fast the virus is spreading. The number shows how many people are on average infected by someone who is infected with the corona virus. The number of transmissions remains more or less constant when the reproduction number is 1, declines when it is less than 1 and increases when the number is above 1.

The reproduction number over time

This graph shows the reproduction number over time. Data for the last two weeks is incomplete, because a reliable calculation of the reproduction number can be made after 14 days.

Show everythingPast 5 weeks

This graph shows the reproduction number over time. Data for the last two weeks is incomplete, because a reliable calculation of the reproduction number can be made after 14 days. Use the keyboard to navigate through the time in the graph. With the left and right arrow keys you can move backwards and forwards in time. Use the left angle bracket < to go back and the right angle bracket > to go forward. With page-up and page-down you make bigger steps. Use the Home key and End key to go to the beginning and end of the timeline.

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