COVID app launches today. Would encourage everyone to download & use - we need every tool we can get to tackle this pandemic, and effectiveness will increase dramatically with number of users. Plus there are couple of features I hope could be particularly powerful...1/ https://twitter.com/NHSCOVID19app/status/1309018795697221638

First, streamlining venue registration could make it much easier to link people to settings of common exposure, helping notify people associated with superspreading events: https://twitter.com/AdamJKucharski/status/1293472353758871552?s=20 2/

Second, the app could help pick up contacts that would otherwise be hard to trace (i.e. causal contacts outside home/work/school) - we estimated that these are the contacts that can really hinder effectiveness of test & trace: https://www.thelancet.com/journals/laninf/article/PIIS1473-3099(20)30457-6/fulltext 3/

Finally, worth remembering that transmission happens in your local network - so regardless of what others are doing, or how tired and frustrated you might be with current situation, you can still help reduce the risk of the people closest to you. 4/4