Studies conducted in April and May 2020 showed that in countries like the United States, Switzerland, and Italy, between 55 and 70% of adults in all age groups were willing to download a contact tracing app (5).
Yet these figures do not match the current DCT apps uptake. Even in countries with robust privacy safeguards in place, downloads of DCT apps have been below expectations. At the time of writing, the Australian DCT app has been downloaded by 6.5 million (26% of the population), the Italian one by 8 million (13.4%), and the newly released French one by 1.5 million (2.3%). Ireland has about 1.3 million active app users (24%), Switzerland 1.8 million (21.5%), and Germany 16 million (19.3%).
Many people wear masks in public to slow the spread of COVID-19, as recommended by the Centers for Disease Control and Prevention (CDC). However, masks with exhalation valves do not slow the spread of the disease, and now, new videos from the National Institute of Standards and Technology (NIST) show why.
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