After an incubation period of 1–4 days, signs of illness start to arise. Symptoms of<unk>  are very similar to those of norovirus. The most common symptoms are vomiting and diarrhea; however, additional symptoms may occur. These include: chills, nausea, headache, abdominal cramps, and myalgia—fever is very rare. While patients most frequently start to show symptoms after the 1–4 day incubation period, there have been cases in which an individual is asymptomatic. Although the individual does not show symptoms, they are still capable of spreading the virus through the general mode of transmission, the oral-fecal route.
Sapovirus
Poliovirus
Echovirus
Mengovirus
Arbovirus
Human bocavirus
Coronavirus 
Coronavirus