1. Adenovirus

What's going around in the past few weeks? Adenovirus seems to be popping out everywhere. Adenoviruses can cause mild to severe illness, though serious illness is less common. People with weakened immune systems, or existing respiratory or cardiac disease, are at higher risk of developing severe illness from an adenovirus infection.

It could present as:

common cold or flu-like symptoms
fever
sore throat
acute bronchitis (inflammation of the airways of the lungs, sometimes called a “chest cold”)
pneumonia (infection of the lungs)
pink eye (conjunctivitis)
acute gastroenteritis (inflammation of the stomach or intestines causing diarrhea, vomiting, nausea and stomach pain