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COVID-19 vaccine boosters are the best defence: Older adults shouldn’t rely on previous infection for immunity

By Dawn ME Bowdish, Canada Research Chair in Aging & Immunity, McMaster University
Andrew Costa, Associate Professor | Schlegel Chair in Clinical Epidemiology & Aging, McMaster University

We still have much to learn about many aspects of COVID-19 — including its lingering health effects and the mechanics of its endless mutations — but we do know one thing: we can’t let our guard down.

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