A recent study by Aga Khan University researchers has revealed that nine out of 10 Covid-19 patients in Karachi — considered by experts as one of the country's epicentres — are asymptomatic.

The research was based on samples of residents from areas with both low and high transmission rates with researchers finding that 95 per cent of those who tested positive for the novel coronavirus through blood tests reported no symptoms.

The study suggested that the reason hospitals in Pakistan did not face the same strain as hospitals in Spain and the United Kingdom was because most patients did not experience any symptoms and, therefore, did not require treatment.

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