Socioeconomic determinants potentially underlying differential global SARS-CoV-2 testing capacity: an ecological study.

Although the 95% CIs overlapped between the global regions, the regional RC in TC showed a negative trend in 2021, suggesting that regional constraints hindered TC upscaling in 2021.

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For ‘Latin America’ ( figure 4C ), a positive trend in Log(PD) 2020 and CHE 2020 , indicates that living in city centres and health expenditure increased TC, but that effects were short-lived due to economic and political instabilities.

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