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.
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Bengaluru to get India’s first sewage surveillance platform for Covid-19
The Karnataka government is introducing a city sewage surveillance system in Bengaluru that will help officials track the novel coronavirus at an early stage, even among asymptomatic persons.