First Nations, Inuit and Métis individuals and non-Indigenous household members aged 18 and over can also start booking these downloads today.
The fourth installments are offered within a recommended period of five months after the initial booster dose.
Residents can make appointments through the provincial vaccination portal, public health units with separate booking systems, clinical vaccinations from natives and some pharmacies.
The fourth installments are already available to residents of long-term care and nursing homes and immunosuppressed in Ontario.
Health Secretary Christine Elliott says a fourth dose provides an extra layer of protection from Omicron and the BA.2 variant.
The growth comes as hospitalizations increase – an increase of 40% each week – and wastewater monitoring suggests that COVID-19 activity is about the same as it was at the peak of the fifth wave in January.
It also comes as the administration of third doses has slowed down. About 96 percent of people aged 60-69 have taken two doses, but only 78 percent have taken a booster dose.
This Canadian Press report was first published on April 7, 2022.
