causes of viral infection
Bacterial and viral infections can cause similar symptoms such as coughing and sneezing, fever, inflammation, vomiting, diarrhea, fatigue, and cramping -- all of which are ways the immune system tries to rid the body of infectious organisms.oth types of infections are caused by microbes -- bacteria and viruses, respectively -- and spread by things such as: 1  Coughing and sneezing. 2  Contact with infected people, especially through kissing and sex.