This is a Biohazard icon. We've made it in iOS style, first introduced in iOS version 7 and supported in all later releases up until now (at least iOS 11). This style is based on thin two-pixel lines and is optimized for 50x50 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 12,500 icons, all in the same style and quality.
It's a closed off circle, like a ring, with an almost flower like shape on top of it. This flower like shape is make of three almost closed off letter c's, which are incomplete circles, at different angles and anchored to the center of the ring beneath them with a single dot.
Related to Biohazard Icon
Related icons are the icons with matching tags, as well as all industry icons. All icons are in the same flat style. You can either download free PNG icons or buy SVG vectors