Why does COVID-19 continue to spread despite mass vaccination?

Shuo Zhang, Zhen Yang, Zhen-Lin Chen, Shi‐Jun Yue, Sai Zhang, Yuping Tang

Frontiers in Public Health · 2022 · 11 citations · 24 references

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Abstract

According to the data released by World Health Organization (WHO), 182 COVID-19 vaccines have entered the pre-clinical trial stage, of which 73 have entered the clinical research stage, and 21 have entered the clinical phase III or phase I II/III (4). Depending on the target and the technology used in preparation, vaccines can be divided Frontiers in Public Health frontiersin.org

References

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