Category:

Facts

People proving to be weakest link for apps tracking COVID-19 exposure

The problem starts with downloads. Stefano Tessaro calls it the “chicken-and-egg” issue:

The system works only if a lot of people buy into it, but people will buy into it only if they know it works.

“Accuracy of the system ends up increasing trust, but it is trust that increases adoptions, which in turn increases accuracy,” Tessaro, a computer scientist at the University of Washington who was involved in creating that state’s forthcoming contact-tracing app, said in a lecture last month.

read more

Explainer: Will COVID-19 vaccines protect us? Does efficacy equal effectiveness?

There is a difference between efficacy rates obtained in clinical trials and effectiveness – the real-world protection rate of a vaccine when it is rolled out.

“Efficacy says: ‘Does it work?’. Effectiveness says: ‘Can it be applied? Can you carry the efficacy to the people?’,” said Marcel Tanner, an epidemiologist and president of Switzerland’s Academies of Arts and Sciences.

read more