Andrew Costa

(He, him)
  • Associate Professor | Schlegel Chair in Clinical Epidemiology & Aging | Canada Research Chair in Integrated Care for Seniors, McMaster University
Researchers found a surprising twist in a study of Omicron infection in older adults. The new information highlights the importance of COVID-19 vaccine booster shots. (Shutterstock)

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

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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