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For the two most impacted countries, Spain and Italy, there is no dramatic change in the IPDV alldays data during the observed time frame, see the chart below for alldays where we have highlighted Spain and Italy:
Spain's 1st case was on Jan 31st. Om Mar 14th a national lockdown was imposed Mar 14. On Mar 30th all non-essential workers were ordered to remain at home. Looking at the chart for Spain above there is evidence of drop off in IPDV when one compares March and April 2020. Taking the means and percentiles plus the averages and standard deviations for March and April we get:
| Mar | Apr | |
| ES median | 0.426 | 0.659 |
| ES 25% | 0.3735 | 0.568 |
| ES 75% | 0.52925 | 0.8005 |
| Mar | Apr | |
|---|---|---|
| ES Average | 0.70 | 0.44 |
| ES Stdev | 0.23 | 0.14
|