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A dose of the coronavirus vaccine was given in Jerusalem last month Maya Alleruzzo / AP / Shutterstock
AS As more data shows that vaccine-induced protection from covid-19 fades over time, many countries are preparing to launch an enhanced program. Israel has already begun, while the US, France and Germany have all announced plans to begin deploying a third dose. Several other countries, including the UK, are holding back, with results from a key trial of third shots expected to be imminent.
The Joint Committee on Immunization and Immunization, an advisory body to UK health departments, has studied…
