Wednesday, July 1, 2020

Plateau for start

Graph 1 Total number of cases, number of active cases, and rate of change in the United States, logarithmic scale.
   On May 30, there was maximum number of active cases (1 176 025),  on June 16, it was surpassed (1 186 227). The number of active cases on July 1, 2020 is 1 454 397.
Graph 2 Daily number of tests and percentage of detected cases in the United States

   On June 14 (111 day of the epidemic), the minimum percentage of detected cases (2.8%) was reached and the trend reversed.
Graph 3 Graph of the total number of infected  people and  number of active cases in Russia

   Although the infection in Russia started 19 days later than in the United States, the percentage of active  cases in Russia is significantly lower.
Graph 4 Daily number of tests and percentage of detected  cases in Russia

   "Saw" in number of tests characterizes the work of laboratories: war by war, and the lunch is by schedule. It is possible that many of them do not work on weekends. On June 30, the epidemic reached another minimum of 1.9 % on day 106 from the beginning of the epidemic.
Graph 5 Charts of normalized Rt reproduction number in the USA and Russia

   If Rt n is greater than 1, the infection widens, and if it less than 1, it fades. In the US, the plateau was not a maximum, but a respite before real growth. In this graph, the difference between the beginning of the epidemic in the United States and Russia is not 19 but 21 days, to  align weekly cycles. As you can see the risk to catch the desease in the US is, at least 30% higher on Saturdays, than on Tuesdays.
   Whether Russia will follow the well-trodden American path, or Russians mostly overcome the desease, will be revealed in a week.




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