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Articles on Contact tracing

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Exposure notification systems alert people when they’ve been exposed to the coronavirus but don’t record the information. AleksandarGeorgiev/E+ via Getty Images

How Apple and Google let your phone warn you if you’ve been exposed to the coronavirus while protecting your privacy

Bluetooth wireless communication makes it possible to track when people have been exposed to people infected with the coronavirus. The right cryptography scheme keeps alerts about exposures private.
Workers prepare to greet passengers at the COVID-19 testing centre in the international arrivals area at Pearson Airport in Toronto on Jan. 26, 2021. THE CANADIAN PRESS/Frank Gunn

Why Canada doesn’t know how many COVID-19 cases are linked to travel

Recently announced travel restrictions are intended to curb the spread of COVID-19 variants. However, we need to do a better job of tracking arrivals into the country.
Designed by psychologists, the free and anonymous web-based app can help you remember who you came in contact with. Ani Ka via Getty Images

This DIY contact tracing app helps people exposed to COVID-19 remember who they met

With new US COVID-19 cases topping 200,000 a day, contact tracers are overwhelmed. Here’s how infected people can start tracing and notifying contacts themselves.
A person wears a protective face mask to help prevent the spread of COVID-19 as they walk past the emergency department of the Vancouver General Hospital on Nov. 18, 2020. THE CANADIAN PRESS/Jonathan Hayward

Want to save the economy? Start by vanquishing COVID-19

Saving the economy requires minimizing, if not eliminating, community COVID-19 transmission.

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