A colourized microscopic image of a cell infected with the Omicron strain of SARS-CoV-2 virus.
Coronavirus, COVID, Seniors, Vaccines

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

We found that those who had battled the BA.1-2 variant of Omicron in early 2022 had a 30-fold higher risk of contracting the BA.5 variant later in the year. That was exactly the opposite of what we, or anyone, would have predicted. What the findings do tell us is that older adults who have had a previous COVID-19 infection shouldn’t rely on that to protect them against reinfection this fall. To protect against severe illness, keeping booster shots up to date is recommended.