Genomic variation, origin tracing, and vaccine development of SARS-CoV-2: A systematic review.

Innovation (Camb) · 2021 · PMC8110321 · PMID 33997827

Europe PMC DOI

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an increasing trendno p-value reported

In most countries, an increasing trend in confirmed cases during the early stages of the outbreak is followed by an exponential growth trajectory before the epidemic peaks.

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