The terrigen crystals ended up in the ocean and infected the fish. It got into fish oil supplements and possibly other things. New Inhumans are being awakened constantly. Luckily whatever happened to infect the fish neutralized the diviner metal, so we aren't having a massive death toll, but Inhumans are popping up and the world is seeing it. We're trying to help, but there's something out there hunting and killing them. So many are dying before we can get to them.