What are the symptoms of type B flu?
Right Diagnosis mentions that type B flu is a type of influenza virus. It is sporadic and does not spread on a pandemic level. It is only an epidemic-based illness, but the virus is highly contagious. WebMD notes that type B is not as dangerous as type A, but it can be very harmful in certain cases. Right Diagnosis adds that the virus mutates rapidly, which is why people need regular vaccinations to remain protected. However, Wikipedia notes that the virus evolves slower than type A but faster than type C.
Sources: rightdiagnosis.com, rightdiagnosis.com, webmd.com, en.wikipedia.org