This is the Zagrożenie biologiczne icon for Windows 10. Here we go. Optimized for 32x32 px, these are the simplest icons in the line style. Downloadable formats are PNG and SVG, among others. Icons8 icon pack is unique in providing a huge number of icons designed by the same team of four designers who create the new icons every working day in the same style and with the same quality. Same cool as the Bat Face, huh.
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.