On Thursday, the Public Health Agency of Canada announced it plans to test wastewater across the country for traces of the polio virus. In Canada, the last polio cases was reported in 1994, according to Ontario Health. Officials in London, England, have found polio virus samples in wastewater, and a case of polio was found in New York state in late July. Jerusalem had an outbreak of several polio cases in the spring, the first in more than three decades. While the oral vaccine is effective, much of the western world has switched to the more expensive inactivated vaccine, though the oral vaccine continues to be used globally particularly in the Global South.

Source: thestar August 13, 2022 00:21 UTC