Even adults are at risk of rota virus, as when the caretaker of infected child comes in contact with stool and vomiting then the chances of getting infection to adults are very high. The symptoms of rotavirus are lethargy, dry cool skin, absence of tears when crying, dry or sticky mouth, sunken eyes or sunken fontanel (the soft spot on the head of infants), and extreme thirst which persist from 3 days to 9 days.