There is a sudden increase in the number of patients having symptoms of cough, nausea, vomiting, sore throat, fever, body ache, and diarrhoea in some cases. The infection usually lasts for about five to seven days. The fever goes away at the end of three days, but the cough can persist for up to three weeks. As per information from NCDC, most of the cases are H3N2 Influenza virus.