May 20, 2021, 1:27 PM
(From Wall Street Journal) While most countries are still cranking up their vaccination drives, some are already making plans to deliver millions of booster shots as soon as September of this year. Disease experts say the need for a winter vaccine drive will depend on whether vaccine-induced immunity fades over time and if the current crop of vaccines are effective against virus variants. Some public-health experts say talk of booster programs is premature, given the gaps in our knowledge about the virus and the vaccines that combat it. But others say governments are right to move fast rather than wait for these questions to be settled.
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