There is a possibility of re-infection after healing from an omicron variant infection. The omicron variant is a mutated strain of the new coronavirus. After patients infected with the omicron variant are cured, their bodies may produce protective antibodies that help prevent reinfection. However, this protective mechanism is not absolute and reinfection is still possible. This is especially true if the antibody titer in the body gradually decreases over time, or if the new coronavirus mutates, which may cause reinfection. To summarize, even if patients infected with the Omicron variant are cured, it is still necessary to take measures to prevent re-infection by wearing a mask.