Daily Covid-19 Stats Nº 21

New visua­li­sa­tion of the corona spread in Germany: the daily new cases (bars), sum of the regis­tered cases (dotted line), sum of the dead (black) … in between the poli­tical measures to curb the spread

End of Day Summary (21). Apart from my scien­tific streak, it’s mainly my inte­rest in design that has led me to build my daily coro­na­virus statis­tics. That’s why I have rethought and reor­ga­nized my style of visua­li­za­tion today. After more than three weeks with steeply rising expo­nen­tial curves the daily devia­tions in the lower part of the coor­di­nate systems are hardly noti­ce­able. My focus are now the daily changes, not the fore­casts, which can still be seen in the table, as well as the growth rates. The table is now at the end of the article.

The first figure (above) shows the increase of the regis­tered Covid19 cases in Germany, from March 9–31. The focus is now on the daily new cases (bars), where the flat­tening of the infec­tions is more appa­rent than in the dotted curve with the summed cases. The deaths (black bars) at the bottom of the chart seem a bit lost … I would like to change that in a revi­sion soon. Particularly when looking back over an entire month, it is helpful to fade in the poli­tical measures, some of which at the end of the month seem much further away than they really are.

The second picture (above) is dedi­cated to the coro­na­virus condi­tions in my home­town Berlin. At the sugges­tion of some Twitter follo­wers, I have now added up the total number of regis­tered cases against 5 subgroups: the cured (green), the people in domestic quaran­tine (blue), the Covid19 pati­ents (orange), the severe ICU cases (yellow) and the deaths (black with figures).

You can hardly see it in this presen­ta­tion, but in the table below: The growth rate in Berlin today decreased from ×1.4 to ×1.2 (related to 3 days), which corre­sponds to a doub­ling of regis­tered cases in 9.5 days. On Saturday, Angela Merkel set the goal “doub­ling in 10 days” … behold: We are slowly approa­ching this thres­hold.

Today’s Table – the complete picture:

Today, the number of regis­tered cases in Germany has risen by 4100, and thus the deve­lop­ment has slowed down again, what is also reflected in the growth rate, which falls by 0.1 for the fourth time: from ×1.5 (Sat), to ×1.4 (Sun), to ×1.3 (yesterday) to ×1.2; this corre­sponds to a doub­ling in 9.5 days, which can today really be consi­dered a success of the distan­cing measures.

The increase in the number of deaths has also slowed today, to ×1.4 (from ×1.5 yesterday, this value had changed over­night), which means a doub­ling in 5 days and is still unfor­tu­n­a­tely high. But all viro­lo­gists confirm that the number of deaths will lag behind the number of cases by at least a week.

3 Kommentare

  1. Erik Spiekermann

    While I cannot right now think of a better way, showing 2 diffe­rent data sets (the daily number and the sum total of confirmed cases) in the same y-axis (albeit far apart from each other) is always doubtful. But after looking at the graph for a minute, it becomes clear.
    Thank you, Jürgen, this is by far the most useful chart I know for this topic.

  2. Gerhard Großmann

    At first I was a little confused, too, by the two diffe­rent values in y-direc­tion. The colo­ring makes it easier to under­stand, thank you! For me the ques­tion remains if there’s a rela­tion between the two measu­rements, e.g. if 1,750 new cases is somehow tied to 20,000 regis­tered cases or if the dotted line should be parallel to the bars.
    The Berlin chart is really nice, thanks for these great diagrams!

  3. Holger Fehsenfeld


    The only rela­tion between the two scales is the attempt to spread both – the dotted line and the bars – over the whole area and to be able to draw only one set of hori­zontal lines for both scales.
    The diffe­rent colours, both being BLUE, seem to address a nice aesthetic ;-) Substituting one of them with the GREEN of the healed cases in the second chart might help to an easier under­stan­ding for those who are untrained inter­pre­ting charts with two y-axis.

    Thanks to Jürgen for his excel­lent work and textual inter­pre­ta­tions.

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