“We are moving from a BA.1 wave to a BA.2 wave.\u0022
The concern comes as Ontario and other provinces are dropping pandemic restrictions and immunity from third doses of COVID-19 vaccine is waning for many of the most vulnerable. Ontario is offering fourth doses to long-term care and other vulnerable residents.
Research shows that, three months after receiving a booster dose, the chance of becoming hospitalized with an infection roughly doubles.The timing of BA.2 coincides with what is likely waning immunity from vaccines for long-term care and other residents, who were among the first to receive booster doses.
The rise of BA.2 also coincides with the dropping of pandemic restrictions. Provincial vaccine mandates were dropped this week. Many institutions, including hospitals and long-term care homes, say they plan to leave vaccination mandates in place. The group also called on the province to actively encourage vaccination and boosters for seniors, essential caregivers and staff in long-term care, noting that evidence is emerging that vaccine effectiveness against infection decreases over time.
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