What does Leviticus 13:45 mean?

Anyone with this kind of disease has to wear torn clothes, leave their hair messy, cover the lower part of their face, and shout, 'Unclean! Unclean!' whenever people come near. Leviticus 13:45 - Modern Text Bible

(People with this disease had to make it obvious to others that they were unclean, both for public health and to follow the law.)