Adenoviruses are common and typically cause mild cold or flu-like symptoms. Adenoviruses can cause illness in people of all ages any time of year. People with weakened immune systems or existing respiratory or cardiac disease are at higher risk of developing severe illness from adenovirus. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.