BSL means British Sign Language. It is a visual way of communicating used by deaf people to talk to each other. BSL is the sign language used in the UK. Other countries have their own sign languages.
BSL-1 and BSL-2 differ primarily in the risk level of agents handled and the stringency of safety precautions. BSL-1 labs handle low-risk, non-pathogenic microbes with minimal precautions. BSL-2 labs manage moderate-risk pathogens associated with human disease, requiring stricter access control, enhanced PPE, and biosafety cabinets (BSCs) to manage infectious aerosols
For most people, the best way to learn to sign is through a BSL course taught by a qualified BSL teacher. Learning BSL in a class allows your teacher to watch you signing, spot any mistakes or habits, and help you to improve.
To sign "Hi" or "Hello" in British Sign Language (BSL), raise your dominant hand to the side of your head and wave it back and forth. Another common, formal, or regional variation is to place both hands flat against the chest and move them outwards, often accompanied by a friendly facial expression.
After finishing, you can use BSL confidently in real-life situations and explore roles in education, healthcare, customer service, or community work where sign language skills are highly valued.