The 3D illustration depicts measles virus outside / inside a host cell. Knobby structures on the virus surface are two surface proteins that aid in binding and invading a host cell.

Measles:  enveloped single strand RNA virus with 1
-serotype: Family:paramyxoviridae; Genus: morbillivirus
-humans:  the only natural host of measles virus
-contagious disease typically spread by coughing, sneezing
-virus enters respiratory system, then spreads throughout the body
-virus can spread before symptoms appear
-virus can live outside human body for 2 hrs
-can cause serious health complications