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Spread of the virus
- Reproduction number

Reproduction number

The reproduction number (R) shows how fast the coronavirus is spreading. The number shows how many people are infected on average by a person who carries the virus. That is why it is important to keep an eye on the R.

Last values obtained on Tuesday, 21 March 2023. Is updated on Tuesday and Friday.

Source: RIVM

More information and data files in 'Coronadashboard data explained' 

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Reproduction number

0.84
0.14 lower than the value of Friday, 3 March 2023

This is a calculation of the number of people infected by 1 person with corona. We show the reproduction number from 2 weeks ago, because a reliable calculation of the reproduction number can be made after 14 days.

Image to support the explanation above

The reproduction number (R) indicates how fast the coronavirus is spreading. R shows how many people on average are infected by someone who carries the virus. With an R of about 1 the number of infections remains about the same, lower than 1 is a decrease and higher than 1 is an increase.

Value of Tuesday, 7 March 2023 obtained on Tuesday, 21 March 2023 · Source: RIVM

Reproduction number over time

This graph shows the R-number over time. Data for the last 2 weeks is incomplete, because a reliable calculation of the reproduction number can only be made after 14 days.

The map shows "Show all"
The map shows "Last 30 days"
The map shows "Last 3 months"
The map shows "Last 6 months"
The map shows "Last year"
This graph shows the R number over time. Data for the last 2 weeks is incomplete, because a reliable calculation of the R can only 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.
  • Reproduction number

Value of Tuesday, 21 March 2023 · Source: RIVM

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