Table 2.

Percent change since previous date in global averages for mortality ratio, stringency index, residential mobility, new cases smoothed per million, and compliance on key dates.

Period/event	Date measured	Change in mortality ratio (%)	Change in stringency index (%)	Change in residential mobility (%)	Mean new cases growth rate (%)	Change in compliance with 3-month window (%)
Pandemic status declared	11/03/2020	NA	NA	NA	NA	NA
Uncertainty period	24/04/2020	5.16	53.47	19.41	157.85	NA
Beta detected (South Africa)	15/05/2020	− 2.65	− 5.49	− 4.36	− 8.21	− 3.84
WHO recommends masks	06/06/2020	− 1.71	− 7.33	− 4.06	40.85	− 7.69
Delta detected (India)	15/10/2020	− 1.07	− 14.08	− 4.85	314.03	− 59.57
Start of vaccine rollout/end of 2020	31/12/2020	0.84	3.81	4.52	54.66	18.82
Omicron detected (multiple countries)	15/11/2021	− 0.67	− 11.69	− 9.73	54.08	− 35.26
End of 2021	31/12/2021	− 0.73	1.29	3.63	94.07	− 12.13
Height of omicron	26/01/2022	− 0.17	2.18	0.84	199.76	− 6.81