New Monitor: Contacts and the Pandemic

In addition to mobility, we now show the average contacts in the population over time—with equally exciting insights into the course of the pandemic.

The mobility of people gives us an important overview of the pandemic, but it is actually the contacts between people that are instrumental in the infection dynamics: Transmission mostly occurs when people meet.

With the new contact monitor we make these contacts visible. The monitor shows the average number of contacts that a person in Germany had on a given day.

You can clearly see how strongly contacts have decreased in March 2020, and how they are still at a low level more than a year after the start of the pandemic. Also visible are the different phases of the pandemic and reactions to it with lockdowns, relaxations, holidays and vacations.

The number of contacts is calculated from GPS mobile phone data and provided to us as an anonymous statistic - more on the methodology here.

We will analyze the contacts in more detail in the near future and investigate what conclusions can be drawn about infection dynamics. For example, in the study Ruediger et al., contacts were shown to be related to the reproductive number R.

If you have any questions or feedback about the new contact monitor, please send us an email at

Frank Schlosser
Frank Schlosser
Scientific Project Lead

Frank is researching human mobility and its relation to epidemic spreading