Why Mondays see a dip in fresh Covid cases

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Why Mondays see a dip in fresh Covid cases


NEW DELHI: The number of new Covid cases across India fell this Monday by nearly 3,000 from Sunday’s count, reaffirming a pattern seen week after week for at least two months now. The pattern is this: daily case counts peak over the weekend, mostly on Sunday, and see a drop on Monday.

The trend has held for too long — nine weeks in a row — for it to be a statistical quirk. For instance, fresh cases recorded this Monday were 22,007 — a big drop from Sunday’s tally of 24,976. In the previous week (June 28-29), Sunday’s count was 19,741, which dropped to 18,870 the next day.

TOI looked at data of daily Covid-19 cases since May and found that the “Monday dip” pattern has held on all 10 weeks during this period, except the very first Sunday-Monday (May 3-4).

The best explanation for why the case count falls every Monday lies in the testing figures. The number of tests conducted falls every Sunday, which then reflects on the number of cases detected on Monday, and sometimes on Tuesday as well, since the results of the RT-PCR tests take 24 to 48 hours to arrive.

According to the website

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