The Guardian

Asymptomatic coronavirus: how common is it and can its spread be contained?

A nurse tests a patient at a Canberra drive-through COVID-19 testing site. Scientists are learning more about asymptomatic spread of coronavirus and its prevalence. Photograph: Rohan Thomson/Getty Images

Since the Covid-19 outbreak began, many have been concerned about asymptomatic spread – that is, people who have the virus but show no symptoms, so therefore don’t take measures to quarantine themselves.

As the virus spreads throughout the world more research can be gathered, and scientists are learning more about asymptomatic spread and its prevalence. Findings . Australian researchers led by Prof Alvin Ing from Macquarie University in Sydney analysed tests from all 217 passengers and crew on board a ship that departed from Argentina for a 21-day cruise of the Antarctic Peninsula in mid-March,

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