Graphics: Why is universal COVID-19 testing good for Hong Kong?

China's Hong Kong Special Administrative Region (HKSAR) kicked off a mass screening for COVID-19 on Tuesday.

Under the testing scheme dubbed "Universal Community Testing Programme (UCTP)," each of the city's 7.5 million residents will be able to take one free test voluntarily.

Since early July, Hong Kong has seen the worst wave of the COVID-19 outbreak, pushing its total reported cases to 4,811, with 89 deaths as of Monday. The sources of infection of many cases remain unknown, indicating a high risk of community transmission.

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