Biohazard ☣️

Three curved, interlocking crescents arranged in a circular pattern, typically rendered in black, orange, or yellow. The biohazard symbol is distinctive and deliberately unsettling—the curved design creates a sense of rotation and danger. It's used worldwide to mark materials contaminated with biological hazards like infectious diseases, blood, or dangerous pathogens. The symbol is instantly recognizable to healthcare workers, laboratory professionals, and scientists.

In digital spaces, people use this emoji similarly to the radioactive symbol—to indicate something is toxic, dangerous, or contaminated. It appears in jokes about biological threats, pandemic-related conversations, or playfully when describing something gross or repulsive. "That bathroom? ☣️" conveys disgust humorously. It's also used in serious discussions about biohazard safety, public health, and medical waste.

The emoji gained prominence during the COVID-19 pandemic when discussions about infectious disease became mainstream. People use it to reference pandemics, diseases, or—jokingly—their own poor hygiene or messy spaces. In memes, it signals something is contaminated or "infected" with bad vibes.

The biohazard symbol, created in 1966 at Dow Chemical Company, is one of the most recognizable hazard marks globally. This emoji was approved as part of Unicode Emoji 1 in 2015, bringing the biohazard warning into digital conversations where it now serves both serious and humorous purposes.