A vaccine reaction is any injury or condition that occurs as a result of a vaccination that has been given to protect against disease. Serious reactions to vaccines are very rare, and vaccination is far less risky than the catching the disease it prevents. Reference from A.D.A.M.
The United States Marine Corps (USMC), also known as the United States Marines, is a branch of the United States Armed Forces responsible for providing power projection, using the mobility of the United States Navy, by Congressional mandate, to deliver rapidly, combined-arms task forces on land, at sea, and in the air.
The Marine Corps is an organization built around success and the opportunity for growth and advancement. Making good Marines begins in recruit training but it continues for an entire career. As has always been the case, the backbone of the Marine Corps is its young men and women. Marine Corps enlistment terms are for three, four, or five years depending on the type of enlistment program.