Recently, more than 40,000 people living in around a dozen suburbs in Sydney were asked to get tested for Covid-19 after traces of the novel coronavirus were found in sewage water in the areas despite no new local cases.
Recently, more than 40,000 people living in around a dozen suburbs in Sydney were asked to get tested for Covid-19 after traces of the novel coronavirus were found in sewage water in the areas despite no new local cases.