A huge database of Egyptian WhatsApp contacts has publicly been leaked. The data, which reportedly contains billions of user profiles, is being traded online. It's still a mystery how the database was obtained, but it has triggered serious concerns about data privacy. Experts are advising users to

A recent breach/leak/exposure of countless/massive/thousands upon thousands of Russian WhatsApp numbers has sparked alarm/concern/fear about the grave/serious/dire consequences/repercussions/implications for individuals/users/citizens. These leaked details/figures/records are now circulating/accessi