Based on the search results, there are several illnesses that are currently going around, but it is not clear which one is specifically referred to as the "flu bug." However, there is information on norovirus, which is sometimes called the "stomach flu" or "stomach bug". Norovirus is a highly contagious virus that causes vomiting and diarrhea, and it is currently on the rise in the United States. It is important to note that norovirus is not related to the flu, which is caused by influenza virus. Other illnesses that are currently going around include COVID, strep throat, croup, viral syndrome, RSV, environmental allergies, mono, and pneumonia. It is recommended to take precautions to protect oneself and others from these illnesses, such as frequent hand-washing and disinfecting shared surfaces. If someone is experiencing symptoms of an illness, they should consult with a healthcare provider for proper diagnosis and treatment.