Biohazard

⚠️ warning ⚠ warning ☢ radioactive ☢️ radioactive ☣️ biohazard 🚫 prohibited 🚸 children crossing 🚱 non-potable water 🚷 no pedestrians ⛔ no entry 🚭 no smoking 📵 no mobile phones 🚳 no bicycles 🚯 no littering 🔞 no one under eighteen