Vaccines can be traced back to as early as 1000 C.E. China, but the first modern vaccine was discovered by Edward Jenner in 1796 from cowpox material to stop the spread of smallpox. The word vaccine comes from Jenner’s discovery, as vacca in Latin means cow. A vaccine is defined as, “a substance that is usually injected into a person or animal to protect against a particular disease” (“vaccine”). Some common vaccines that are administered today are for Chickenpox, Diphtheria, Flu, Hepatitis A and B, Hib, HPV related cancers, Measles, Meningococcal Disease, Mumps, Polio, Pneumococcal, Rotavirus, Rubella, Tetanitus, and Whooping Cough.