Should quarantine be reduced to seven days?

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This week Belgium is shortening the quarantine period for people who have been in contact with someone who has tested positive for Covid-19. They will now have to isolate for one week. The hope is that it will help more people to stick to the rules. A 14 day quarantine is recommended by the World Health Organization but Professor Steven van Gucht, who is head virologist at the National Institute of Public Health in Belgium, says the risk of missing a few positive cases is relatively low. (Image: A teenage girl in a mask showing a 'stay home' message written on her hand, Credit: Ti-ja/Getty Images.)