Vaccines aren’t guaranteed 100%, but they can help prevent many diseases and conditions.  Here are a few (there are others):



Vaccine How would I get this disease? Is there a cure if I get it?
Hepatitis A Food NO - it has to go away on its own, and may take its own time to go away.
Hepatitis B IV drug abuse, tattos and piercings, sexually transmitted.  Extremely contagious! NO - and if you develop chronic hepatitis B, it can kill you.
Flu Touching something someone has sneezed upon! NO - and people die of influenza each year.
HPV Sexually transmitted, mostly.   NO - it has to go away on its own.  Some forms of HPV can cause cancer, some form skin warts.
Memingitis Sharing eating utensils. Maybe, but it is lethal, too.