Open source projects like #CovidShield are so important. A @ScienceMagazine study found 46% of transmission is PRE-SYMPTOMATIC. Rapid & complete #ContactTracing is essential to personal & economic health. 80% of Cdns support using a #ContactTracingApp v 63% would take a #vaccine. https://twitter.com/tobi/status/1262556561836314627

Here's an infographic on the study I conducted with two of my @SenateCA colleagues. More Cdns support #PublicHealth officials using anonymized mobile device data to support #ContactTracing than would take a #vaccine once approved.

Here's a link to the May 8, 2020 @ScienceMagazine study that found that found manual #ContactTracing to be too slow & recommended using a #ContactTracingApp that builds a memory of proximity contacts & immediately notifies contacts of positive cases. https://science.sciencemag.org/content/368/6491/eabb6936.full