Norovirus is highly contagious and very difficult to control. In general, the Norovirus epidemic broke out in hospitals, nursing homes, schools, hotels, and cruise ships. Calicivirus, including Norovirus and sapovirus, is also an important animal pathogen, leading to ‘cat flu’ associated with high mortality in domestic cats. In a new study, British researchers used cryo-electron microscopy to study the structure of the feline calicivirus that causes cat flu to better…