Usually when a persons skin is paler it is usually the result of a cold of temperature
may be or may be not
Paleness may be the result of decreased blood supply to the skin. It can also be due to decreased number of red blood cells (anemia). Paleness of the skin is not the same as loss of pigment from the skin. Paleness is related to blood flow in the skin rather than deposit of melanin in the skin
Medical Definition of Vaccination. Vaccination: Injection of a killed microbe in order to stimulate the immune system against the microbe, thereby preventing disease. ... To immunize against viral diseases, the virus used in the vaccine has been weakened or killed.
Vaccines can be described as drugs, or medication, since that's pretty much what it is. I'm sorry if I sound a little vague, but I don't know much about this