https://www.reuters.com/article/us-health-coronavirus-google-apple/u-s-senator-says-apple-google-must-convince-public-that-contact-tracing-will-not-violate-privacy-idUSKCN21X32M >Smartphone software makers Alphabet's Google and Apple need to convince the public that their efforts to build apps to help track who has been exposed to the new coronavirus will not lead to a violation of their privacy, Senator Richard Blumenthal said in a statement on Wednesday.