Locally acquired infections of Covid-19 in Hong Kong, particularly those of unknown origin, have risen to worrying levels, sparking concerns of a fourth wave of the disease.
The government has to take decisive action. Consideration of mandatory testing makes sense, although if implemented, such a step needs to be properly targeted at high-risk groups. To be effective, it has to be accompanied by stringent contact tracing and a population that understands the importance of strict adherence to social distancing rules.