Illustration: Lau Ka-kuen
Which vaccines stop Omicron? Search for data moves from labs to real world
- As coronavirus variant’s rapid spread forces rethink of Covid-19 vaccine strategies, real-world data can help show jabs’ effectiveness against it
- But various challenges surround that data, not least that it is difficult to get until Omicron has infected even more people, and in more countries
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Illustration: Lau Ka-kuen