Respiratory syncytial virus (RSV) is the most common germ that can cause serious infections in infants, especially those in certain high-risk groups. Currently there is no vaccination against RSV available.
Infants & Adults
Norovirus is the most common cause of acute gastroenteritis in the United States alone. Each year, it causes 20 million illnesses and contributes to ten thousands of hospitalizations and several hundred deaths. Additionally, the Norovirus is also the most common cause of foodborne-disease outbreaks. The infection can be serious, especially for young children and older adults.
Parvoviruses can cause diseases in both humans and animals. Usually, the gastrointestinal tract and lymphatic system are affected, causing vomiting, diarrhea and immunosuppression.
Varicella is an acute, highly contagious disease. In temperate climates most cases occur before the age of 10 years. While mostly a mild disorder in childhood, varicella tends to be more severe in adults.
In the United States congenital cytomegalovirus infection is the most common viral infection of infants. About 1 in 150 children is born infected.
The infection causes more long-term problems and childhood deaths than Down syndrome, fetal alcohol syndrome, and neural tube defects.