The World Health Organization says sub-variants of Omicron, like BA.4 and BA.5, continue to drive waves of cases, hospitalization and death around the world. CGTN talked to Dr Alice Hyun-Kyung Tan, a doctor of Internal Medicine at MizMedi Women's Hospital in Seoul. She gave her opinion on the effectiveness of the current vaccines.

For more:
https://news.cgtn.com/news/2022-07-17/WHO-Omicron-sub-variants-fueling-global-surge-in-cases-1bK2t4XlDLW/index.html

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